Federal Reserve Monetary Policy and Inflation Prospects

A Bayesian Game-Theoretic Scenario Analysis Ahead of the 52nd G7 Summit, Évian-les-Bains, June 15–17, 2026

 

Preface: A Note on Timing

This paper is submitted three weeks before the 52nd G7 Summit convenes in Évian-les-Bains, France — and within twenty-four hours of two signal events that have materially altered the monetary policy landscape. On May 22, 2026, Kevin Warsh was sworn in as Federal Reserve Chair at the White House, taking office at a moment of mounting uncertainty over inflation, geopolitical conflicts, and volatile financial markets, alongside rising political pressure on the central bank's independence. On the same day, outgoing Governor Christopher Waller declared that the Fed's next interest-rate move is just as likely to be an increase as a cut, citing the energy shock from the Iran war as the key driver of renewed price pressures.

These two developments — a leadership transition at the world's most consequential central bank and a serving governor publicly placing rate hikes back on the table — define the precise analytical moment in which this paper is written. They demand that policymakers arriving in Évian understand not merely the technical contours of current inflation data, but the deeper strategic, institutional, and expectation-formation dynamics that will shape monetary outcomes through 2027 and beyond.

Executive Summary

The global macroeconomic environment entering the 2026 G7 Summit is defined by a deeply uncomfortable convergence of geopolitical rupture, energy insecurity, supply-chain vulnerability, and acute monetary-policy uncertainty. The cautious optimism that characterized late 2024 and early 2025 — when disinflation appeared durable and major central banks were preparing for a measured easing cycle — has given way to a far more unstable equilibrium.

The proximate cause is the conflict that began on February 28, 2026, when a US-Israeli military operation against Iran triggered the most severe energy supply disruption since the 1970s. Attacks on energy infrastructure and shipping disruptions in the Strait of Hormuz, which handles approximately 35% of global seaborne crude oil trade, triggered an initial reduction in global oil supply of roughly 10 million barrels per day — the largest oil supply shock on record. Brent crude prices surged to multi-year highs in late April and early May, exceeding $100 per barrel, reflecting fears of prolonged disruptions to shipments through the Strait.

The inflationary consequences have been swift and broadening. The US consumer price index rose at a seasonally adjusted 0.6% in April 2026 alone, putting the one-year pace at 3.8% — the highest since May 2023 — while core CPI, excluding food and energy, increased 2.8% year-over-year, the sharpest rate since September 2025. Professional forecasters now project headline CPI inflation reaching 6% for the second quarter of 2026, compared with a prior estimate of 2.7% made just three months earlier.

Simultaneously, the Federal Reserve has undergone the most consequential leadership transition in nearly a decade. Kevin Warsh was confirmed by the Senate in a 54-45 vote — the most divisive in Fed history — and began his term as chair on May 15, 2026, inheriting an economy contending with the highest inflation in three years and the most acute geopolitical energy shock since the 1970s.

The G7 Finance Ministers and Central Bank Governors met in Paris on May 19, 2026 — just days before this paper's submission — and issued a communiqué acknowledging that central banks are closely monitoring the impact of energy and other commodity price pressures on inflation, inflation expectations, and economic activity, with monetary policy remaining explicitly data dependent.

The analytical framework of this paper argues that the current juncture represents more than a cyclical shock. It may mark the formal end of the era in which central banks could reliably distinguish between temporary and persistent inflation — and the beginning of a new regime in which geopolitical instability becomes structurally embedded in monetary policy formation.

I. The Strategic Transformation of Inflation Dynamics

I.i. The Fracture of the Prior Framework

The dominant macroeconomic assumption between 2010 and 2020 was secular stagnation: structurally low inflation, weak productivity growth, aging populations, excess global savings, and persistent disinflationary pressure from deepening globalization. That framework has now fractured comprehensively.

Three overlapping transitions have fundamentally altered the inflation process. First, the fragmentation of globalization into geopolitical and economic blocs has reversed decades of disinflationary supply-chain integration. Second, the weaponization of energy, trade, and supply chains — most dramatically through the Iran conflict's targeting of Strait of Hormuz shipping — has transformed commodity markets from economically to geopolitically priced. Third, the emergence of repeated exogenous shocks in rapid succession, rather than isolated disruptions separated by prolonged periods of normalization, has altered the statistical environment in which expectations are formed.

I.ii. The Sequencing Problem

The Federal Reserve initially interpreted both the 2021–2022 pandemic inflation and the 2025 tariff shock as temporary and manageable. Governor Waller explicitly defended those earlier judgments. However, the subsequent Middle East conflict altered the strategic calculus precisely because the new inflationary shock arrived before inflation expectations had fully normalized from the tariff episode — raising the possibility that this series of price shocks may lead to a more lasting increase in inflation, as occurred with the sequence of shocks during the pandemic.

This sequencing matters enormously. In classical macroeconomic thinking, independent temporary shocks should not permanently alter long-run inflation expectations if the central bank's credibility is robust. But Bayesian expectation formation operates differently: economic actors continuously update their beliefs based on observed patterns. When inflationary disturbances occur repeatedly within short intervals, without full normalization between episodes, households and firms may infer that the underlying system itself has changed — not merely that bad luck has recurred.

I.iii. The Geopolitical Shock Architecture

The current episode is distinguished from prior shocks by both its magnitude and its architecture. The World Bank's April 2026 Commodity Markets Outlook projected that energy prices would surge 24% in 2026 to their highest level since Russia's invasion of Ukraine — and warned that Brent oil prices could average as high as $115 per barrel in a scenario where critical oil and gas facilities suffer sustained damage.

This war has landed in a global economy already navigating tariffs, post-pandemic debt overhangs, and inflationary pressures that central banks in Europe and Asia had only recently begun to contain. Iran, unable to match the US and Israel militarily, is internalizing the costs of war by targeting energy, shipping, commercial, and civilian infrastructure across the Persian  Gulf — effectively internationalizing economic pain.

The cumulative shock sequence now confronting policymakers is:

1. Pandemic-driven supply-demand imbalances (2021–2022)
2. Russian invasion of Ukraine and energy embargo (2022)
3. Global supply-chain reconstitution and deglobalization pressures (2023–2024)
4. US tariff shock and trade fragmentation (2025)
5. US-Israel-Iran conflict and Strait of Hormuz disruption (February 2026–present)

Each successive shock has arrived in an economy still absorbing the inflationary legacy of the previous one. In this sense, the Bayesian updating concern is not merely theoretical — it is empirically grounded in the observed pattern of the past five years.

II. Bayesian Updating, Expectation Formation, and the Limits of Inflation Targeting

II.i. Waller's Conceptual Shift

The most intellectually significant dimension of Governor Waller's May 22, 2026 speech — delivered in Frankfurt at a Center for Central Banking event and now to be his final major address as a rank-and-file governor before serving under Chair Warsh — was his direct engagement with Bayesian expectation dynamics.

Waller acknowledged that some inflation expectations from one to five years ahead have moved upward since the beginning of 2026, which he described as concerning, while noting that longer-term expectations remain relatively anchored. He stated he would be watching market-based measures carefully to determine whether this near-term inflationary view begins to migrate into longer-term expectations.

This represents a conceptual evolution. The statement acknowledges that a clean distinction between "anchored" and "unanchored" expectations may be giving way to a more treacherous intermediate condition: a gradual, sequential drift in medium-term expectations that has not yet manifested in long-run measures — but which, under continued shock pressure, could do so.

II.ii. The Mechanics of Bayesian Expectation Drift

From a Bayesian perspective, economic agents continuously revise their probabilistic assessments of future inflation based on the accumulating information set. Each new inflationary shock functions as new evidence. In isolation, a single shock may be easily attributed to a temporary cause and discounted accordingly. But as shocks accumulate, the rational posterior probability that the economy has shifted into a structurally higher-inflation regime increases — even if no single shock is individually decisive.

The mechanism operates through several channels simultaneously. Firms, observing that each "temporary" input-cost increase has been followed by another, accelerate price pass-through rather than absorbing costs in margins. Workers, having experienced real-wage erosion across multiple inflationary episodes, demand larger nominal wage adjustments pre-emptively. Bond investors, uncertain whether the central bank will hold its course, require a larger term premium for holding duration. Governments, facing rising debt-service costs, face increasing pressure to seek monetary accommodation.

Waller noted that at least to date, wage growth has been averaging below 4% per year — consistent with inflation close to 2% and productivity growing at a similar pace — suggesting the wage-price spiral dynamic has not yet activated. But this remains the critical near-term indicator to watch.

II.iii. The Credibility Asset and Its Depletion

Modern inflation targeting frameworks are built upon a non-trivial assumption: that the central bank's credibility is sufficient to anchor expectations even in the face of adverse shocks. Credibility is, in this framework, a form of policy capital accumulated over decades of disciplined behavior.

Repeated supply shocks test this capital in a specific way. They place central banks in the position of repeatedly asking markets, households, and firms to accept their judgment that the current shock is temporary and that long-run inflation will return to target. Each iteration of this request either confirms or depletes credibility. If actual inflation persistently exceeds target, the assertion of temporariness becomes increasingly implausible — regardless of whether the underlying shocks genuinely are supply-driven and transitory.

The Fed confronts a version of this problem now. Having declared the pandemic inflation temporary in 2021 (incorrectly), having initially treated the tariff shock as manageable, and now facing a third major inflationary episode within five years, the credibility cost of another "temporary" framing is high. Waller explicitly stated that the Fed's next move is just as likely to be a hike as a cut, noting that "inflation is not headed in the right direction" and that he would not rule out a future rate increase if inflation fails to slow.

This is not routine hawkish signaling. It represents a fundamental rebalancing of the Fed's reaction function in real time — under a newly installed chair, ahead of a G7 Summit, and with inflation data tracking materially above forecast.

III. The New Federal Reserve: Institutional Transition Under Conditions of Acute Uncertainty

III.i. The Warsh Succession: Context and Complications

The leadership transition at the Federal Reserve is itself a major macroeconomic variable that G7 policymakers must incorporate into their assessments. Warsh steps into the four-year role at a time of mounting uncertainty over inflation, geopolitical conflicts, and volatile financial markets, alongside rising political pressure on the central bank's independence.

During his confirmation hearing, Warsh stated that the US economy is still dealing with ripples from a pandemic-driven spike in inflation and that the Fed needs a different framework for assessing it, arguing that the Fed's preferred inflation gauge — the Personal Consumption Expenditures index — offers only a rough approximation, even when volatile food and energy prices are excluded. This statement implies a willingness to rethink measurement frameworks, not merely policy levers — a potentially significant institutional shift.

Warsh was nominated amid President Trump's explicit expectation that he would lower rates — a preference Trump had expressed repeatedly and publicly, including declaring he would only appoint someone who agreed with him on cutting rates. Yet inflation reached a three-year high in April and had been running well above the Fed's 2% target for months — even before the Middle East conflict drove fuel costs sharply higher.

III.ii. The Institutional Tension

Warsh thus faces a structural dilemma that has no precedent in modern Fed history. He was selected under expectations of dovishness, has publicly acknowledged political pressures on the institution, yet has inherited an inflation picture that the existing FOMC majority regards as requiring continued restriction. CME Group's FedWatch tool shows a 97% probability that rates will remain unchanged at Warsh's first policy meeting, scheduled for June 16–17, which coincides almost exactly with the G7 Summit.

This creates an extraordinary institutional overlap: the new Fed chair will convene his inaugural FOMC meeting in the same week that G7 leaders gather in Évian to discuss, among other things, global macroeconomic imbalances and the coordination of monetary policy among advanced economies.

III.iii. The Powell Legacy Within

An additional complicating factor — unprecedented in recent institutional history — is that former Chair Jerome Powell remains on the Board as a rank-and-file governor until 2028, having extended his stay due to a Justice Department investigation focused on renovations at the Fed's headquarters. The last time a Fed chair returned to the board was nearly eighty years ago. The presence of a highly respected former chair — one who resisted political pressure throughout his tenure and whose policies broadly achieved the post-pandemic disinflation — within the same voting committee as his politically appointed successor creates a governance dynamic with no modern parallel.

III.iv. The Strategic Environment: Five Actors, One Game

The Fed now operates within a multidimensional strategic environment involving five categories of actors whose interactions generate reflexive feedback loops:

Strategic Actor	Primary Objective	Key Uncertainty
Federal Reserve	Preserve inflation credibility without causing recession	Whether Bayesian expectation drift has already begun
Financial Markets	Price future policy path and inflation risk accurately	Warsh's true reaction function under political pressure
Households	Protect purchasing power and real wages	Duration of energy shock and food price pass-through
Firms	Preserve margins amid rising input costs	Whether competitors will absorb or pass through costs
Geopolitical Actors	Use energy, trade, and shipping as strategic instruments	Ceasefire terms, Hormuz reopening timeline

The complication is that each actor updates its behavior based on its beliefs about all other actors. This reflexivity means that beliefs themselves function as macroeconomic variables. If markets conclude that Warsh will eventually yield to political pressure for rate cuts, long-term yields may paradoxically rise as investors demand a higher inflation risk premium — tightening financial conditions even without a Fed action. If firms believe their competitors are passing costs through, they have no incentive to absorb — accelerating inflation independently of monetary policy.

IV. Inflation Dynamics Through 2027: Structural Drivers and Current Data

IV.i. Energy: The Dominant Variable

Energy remains the overwhelming near-term driver of inflation, but its significance extends well beyond the headline numbers. Energy costs in the US jumped 17.9% on an annual basis in April 2026 — the steepest increase since September 2022 — driven primarily by gasoline prices rising 28.4% and fuel oil surging 54.3%.

The inflation transmission from energy operates through multiple channels with varying time lags. Transportation cost increases are immediate and pervasive. Food price inflation follows within weeks, given energy's role in fertilizer production, cold-chain logistics, and agricultural machinery. Manufacturing input costs accumulate over one to three months. Services inflation — reflecting higher commuting, delivery, and utility costs embedded in service pricing — broadens over a quarter or more.

This diffusion pattern means that even if the Strait of Hormuz were to reopen tomorrow, the inflationary impulse already embedded in the pipeline would continue to propagate through the economy for months. As financial analyst Stephen Kates observed, unlike tariff effects which took months to filter meaningfully into prices, increases in oil prices are quickly reflected across the entire economy — and are not limited to the gas pump.

The European Union has warned that its inflation rate could surpass 3% this year if Brent oil prices remain around $100 per barrel and gas prices stay elevated for an extended period, with economic growth potentially 0.4 percentage points lower than the 1.4% pace previously forecast.

IV.ii. The Tariff Layer

The energy shock has not arrived in a vacuum. It compounds an already elevated inflationary baseline created by the 2025 tariff regime. The Federal Reserve's March 2026 Summary of Economic Projections raised the median core PCE inflation forecast for year-end 2026 to 2.7%, up from 2.4% projected in December 2025 — a revision made before the full energy shock was incorporated. Given April's CPI reading of 3.8% and the Survey of Professional Forecasters' projection of 6% headline CPI for Q2, the March SEP projections are already substantially below observed reality.

The tariff-energy interaction is particularly important for imported goods inflation. Tariffs raised the dollar cost of manufacturing inputs. The energy shock raised the transportation cost of delivering those inputs. The combination produces a multiplicative, not merely additive, price pressure on goods that depend on both imported components and physical logistics.

IV.iii. The AI Investment Paradox

A second major structural force complicating monetary transmission is the ongoing artificial intelligence investment boom. Governor Waller and Kansas City Fed President Jeff Schmid have both highlighted the resilience of AI-driven capital expenditure despite restrictive monetary conditions. Kansas City Fed President Schmid observed that uncertainty had not been resolved regarding "the effect of higher tariffs on prices and output as well as the potential outcomes of the tremendous surge in artificial intelligence investment on financial markets, productivity and employment."

This creates a paradox for traditional monetary transmission. Consumer demand may soften. Housing may weaken further. Credit-sensitive sectors may retrench. Yet the concentrated capital expenditure driven by AI infrastructure investment — data centers, semiconductor fabrication, power generation, fiber networks — remains highly inelastic to interest rate levels because it is driven by strategic competitive imperatives rather than borrowing costs.

Warsh himself had, prior to his nomination, argued that AI would boost productivity sufficiently to push down inflation and allow rate cuts. That assessment was made before the Iran war, and Warsh acknowledged during his confirmation hearing that the economic landscape had shifted materially since his earlier analysis. The question of whether AI productivity gains will materialize fast enough to offset current inflationary pressures is now central to the monetary policy outlook — and deeply uncertain.

IV.iv. The Fiscal Policy Conflict

Advanced economies are simultaneously experiencing continued and in some cases expanding fiscal stimulus. G7 governments are increasing defense expenditures, industrial policy subsidies, energy transition investments, and strategic manufacturing support programs. The French G7 presidency has identified high debt levels, inflationary pressures, and financial fragmentation as the defining macroeconomic challenges requiring coordinated attention.

This creates a structural conflict at the heart of advanced-economy macroeconomic management: monetary authorities are attempting to suppress demand and inflation while fiscal authorities are injecting structural support that sustains it. The tension is not merely a US phenomenon. It characterizes virtually every G7 economy and represents a departure from the post-2008 era in which fiscal austerity broadly reinforced monetary tightening.

Under these conditions, the long-run neutral interest rate — the rate at which monetary policy is neither stimulative nor restrictive — may itself be elevated relative to the pre-pandemic era. If so, the current federal funds rate of 3.50–3.75% may be less restrictive than the FOMC's assessment implies, which would require a longer period of rate maintenance to achieve equivalent restraint.

V. Bayesian Game-Theoretic Scenario Analysis: Updated Through May 23, 2026

The following scenarios are constructed using observed data current as of May 23, 2026, and incorporate the most recent FOMC communications, energy market developments, and international economic projections. Probability assessments reflect this updated information set. All four scenarios remain live possibilities; what has changed materially since the paper's original drafting is the upward revision in the probability of adverse outcomes.

Scenario 1: Controlled Disinflation via Ceasefire and Energy Normalization

Probability Assessment: Low-to-Moderate (15–20%) Direction of Probability Revision: Downward since early April

In this scenario, a durable ceasefire in the US-Israel-Iran conflict is concluded within the next eight to twelve weeks. The Strait of Hormuz reopens to full commercial traffic. Oil prices retreat materially below $90 per barrel by the third quarter of 2026. The inflationary impulse that has accumulated in the pipeline since February dissipates progressively.

Under these conditions, headline CPI could fall substantially by late 2026, with the one-year rate potentially returning to the 2.5–3.0% range by early 2027. The Federal Reserve, under Chair Warsh, could cautiously reinstate an easing bias and resume rate cuts in early-to-mid 2027.

This scenario corresponds to what the original paper termed a "soft landing with delayed normalization." Its probability has declined since the original drafting for three reasons. The conflict that erupted on February 28, 2026 had, by mid-March, spread to over a dozen countries and created an energy crisis across all G7 members and many others, with serious fertilizer, food, and inflationary costs accumulating. Infrastructure damage to Persian Gulf energy facilities is likely to require months of repair work even after hostilities cease. And the fourth consecutive inflationary shock within five years has already altered medium-term expectations in ways that will not quickly reverse even if the trigger is removed.

Even in this most optimistic scenario, inflation is unlikely to return to the pre-pandemic 2% norm within the forecast horizon, because globalization fragmentation, industrial policy competition, and defense spending remain structurally inflationary irrespective of the energy shock's resolution.

Key policy implication for G7: Allows for cautious and selective coordination toward a phased easing cycle, with the US potentially rejoining a synchronized monetary normalization later in 2027. However, premature signaling of easing — particularly under political pressure on the new Fed chair — would risk re-igniting expectations-driven inflation.

Scenario 2: Persistent Supply-Driven Inflation with Stagflationary Undertones

Probability Assessment: High (45–50%) Direction of Probability Revision: Upward — now the modal scenario

This has become the most probable outcome. In this scenario, the Iran conflict maintains its current trajectory — a partial ceasefire exists but the Strait of Hormuz remains partially constrained, energy prices stabilize at persistently elevated but not catastrophic levels, and producer-price inflation continues to diffuse through the economy over multiple quarters.

The OECD has projected that the Middle East conflict is reviving the specter of inflation and now sees the average inflation rate for the Group of 20 jumping to 4% in 2026, with Secretary General Mathias Cormann warning of "quite a significant level of downside risk" to the outlook.

Under this scenario, the Federal Reserve maintains rates in the 3.50–3.75% range through 2026 and into 2027. Rate cuts disappear from the near-term horizon entirely. Analysts from JPMorgan Chase have already forecast that rates will likely remain unchanged until mid-2027, and have anticipated that rates could rise rather than fall.

This scenario is neither the 1970s nor the post-2008 environment. It represents a new hybrid regime characterized by:

• Moderate underlying growth (1.5–2.5% real GDP), masked by AI investment resilience
• Persistent headline inflation (3.5–5.0%) driven by energy and goods repricing
• Elevated geopolitical risk premium embedded in commodity markets
• High fiscal deficits across all G7 economies
• Structurally elevated real interest rates
• Gradual but measurable drift in medium-term inflation expectations

The most consequential dimension of this scenario is its impact on real wages. April 2026 data already showed real average hourly wages slipping 0.5% for the month and falling 0.3% on an annual basis — a deterioration that, if sustained, will create intensifying political pressure on central banks to ease regardless of inflation levels.

Waller's speech of May 22 strongly implies that this is the outcome the Fed's leadership increasingly regards as the baseline. The explicit statement that the next move could be a hike rather than a cut represents a formal abandonment of the easing bias that had characterized FOMC communications since late 2025 — and the G7 Finance Ministers' communiqué of May 19 confirmed that central banks across the G7 are now oriented toward monitoring inflation persistence rather than planning normalization.

Key policy implication for G7: The formal end of the ultra-low-rate era. G7 governments must recalibrate fiscal planning to account for structurally higher borrowing costs over a 3–5 year horizon. Coordinated energy-market interventions — strategic reserve releases, accelerated alternative-energy deployment, shipping security arrangements — assume heightened importance as complements to monetary policy that alone cannot resolve supply-side inflation.

Scenario 3: Expectations Become Unanchored — The Transition to Regime Inflation

Probability Assessment: Moderate and Rising (20–25%) Direction of Probability Revision: Substantially upward — no longer a tail risk

This is the scenario that keeps central bankers awake at night, and it has moved decisively from a theoretical possibility to a plausible near-term outcome.

The mechanism is Bayesian updating at scale. After five consecutive inflationary episodes since 2021, a growing portion of households, firms, and market participants no longer treats elevated inflation as an aberration to be corrected by policy — they begin to treat it as the new normal to be planned around. Once this psychological transition reaches sufficient critical mass, inflation becomes self-reinforcing: firms raise prices because they expect others to; workers demand higher wages because they expect prices to continue rising; investors demand higher yields because they expect the central bank to eventually accommodate.

The trigger for this scenario could take several forms. A second major energy shock — an escalation that permanently damages Strait of Hormuz infrastructure, or a conflict-related disruption to Saudi or UAE production — would be the most immediate catalyst. Alternatively, a political capitulation by Chair Warsh in response to White House pressure — cutting rates while inflation remains at 4% or above — would cause a rapid deanchoring of expectations. A third pathway would be a disorderly fiscal adjustment in a major G7 economy, creating contagion through sovereign debt markets.

Waller explicitly acknowledged that some inflation expectations from one to five years ahead have already moved upward, which he described as concerning, while warning that he would be watching carefully for any sign that near-term inflationary views begin to contaminate longer-term expectations.

Under this scenario, the Federal Reserve would likely need to resume rate hikes — potentially substantially — despite weakening growth conditions. The economic outcome would be classic stagflation: rising unemployment, persistent inflation, contracting credit, and financial market volatility. Such a scenario would expose a fundamental contradiction: the US has imposed enormous costs on many of the same economies it relies on as trading and strategic partners, complicating the coalition politics required for any coordinated response.

The political economy implications are severe. Real-wage compression combined with high borrowing costs, declining equity values, and rising unemployment would intensify existing populist pressures in virtually every G7 democracy. The G7 itself, as a forum for coordinating policy among democracies with functioning market economies, would face its most significant internal cohesion test since the 2008 financial crisis.

Key policy implication for G7: Summit communiqués should explicitly address expectations management as a collective challenge, not merely a domestic central bank responsibility. A clear, coordinated signal of commitment to price stability — accompanied by coordinated energy market interventions that provide tangible relief — would help counter the Bayesian drift. The credibility of the G7 as a macroeconomic coordination forum is itself a resource that, if deployed authoritatively, can substitute in part for the rate hikes that domestic political pressures resist.

Scenario 4: Global Growth Shock and Forced Accommodation

Probability Assessment: Low but Non-Negligible (10–15%) Direction of Probability Revision: Broadly stable, with elevated tail risk

This scenario emerges if the energy shock proves severe enough to produce a sharp and rapid deterioration in global consumption, credit conditions, and labor markets. Under this pathway, demand destruction operates faster than inflationary diffusion, forcing central banks to choose between their inflation mandates and financial stability.

The World Bank has projected that developing economies will grow only 3.6% in 2026 — a downward revision of 0.4 percentage points from January — and that over 70% of commodity importers worldwide could see weaker growth than previously expected. If this growth shortfall deepens and spreads to advanced economies, the Federal Reserve could face a 2019-style financial conditions shock requiring emergency accommodation.

Governor Waller's January 2026 statement had already warned of "considerable doubt about future employment growth" and suggested that "a substantial deterioration in the labor market is a significant risk." Since that statement, the Iran war has added a major demand-destruction risk on top of an already fragile labor market.

Were this scenario to materialize, the Fed would likely cut rates despite inflation remaining above target, prioritizing financial stability and employment. The risk is that this accommodation — if perceived as politically motivated or structurally premature — triggers a rapid deanchoring of long-run expectations, collapsing Scenario 4 into Scenario 3. The policy challenge is therefore not just timing, but framing: any accommodation would need to be presented as a response to a clearly demonstrated demand collapse, with credible forward guidance on the path back to restrictive policy once the shock passes.

Key policy implication for G7: The G7 should develop contingency coordination frameworks — analogous to the 2008 crisis response, but pre-designed rather than improvised — for the possibility of a sudden global growth shock requiring simultaneous fiscal and monetary accommodation. The absence of such frameworks increases the risk of disorderly, uncoordinated responses that amplify volatility.

VI. Implications for the 52nd G7 Summit at Évian

VI.i.  The Historical Resonance

The venue of the 2026 G7 Summit carries pointed historical significance. The Group of Seven was born in 1975, when the first oil crisis revealed the need for enhanced international economic cooperation. Fifty-one years later, the leaders gathering in Évian confront a second oil crisis triggered by Middle Eastern conflict — this time superimposed on a far more complex mosaic of supply-chain fragmentation, geopolitical bloc formation, technological disruption, and institutional stress.

The echoes of the 1970s are real but must not be over-interpreted. The current episode differs from that decade in three critical respects: central banks have substantially more institutional independence and credibility capital; labor markets, though tightening, have not produced the wage-price spiral dynamics of that era; and the AI productivity wave, if it materializes at scale, represents a disinflationary structural force with no 1970s analog. Nevertheless, the core dynamic — repeated energy shocks testing the limits of monetary credibility — is sufficiently similar to warrant the historical comparison as a cautionary reference point.

VI.ii.  The Coordination Problem in Its Current Form

France's G7 presidency has made macroeconomic imbalances a central priority, with the Banque de France emphasizing that "in a difficult coordination context, the goal of the G7 is to seek out points of convergence despite disagreements." That formulation candidly acknowledges what Évian will actually be: a forum for managing divergence, not projecting unity.

The coordination problem has four distinct dimensions.

Monetary policy divergence. The US, under a new chair facing political pressure for cuts, must maintain credibility against an inflation backdrop that demands restriction. The European Central Bank, which has already warned that the war has made the outlook significantly more uncertain and will have a material impact on near-term inflation, projected average Eurozone inflation of 2.6% in 2026 before easing to 2.0% in 2027. Japan faces fiscal and currency pressures that constrain its policy options in both directions. Canada confronts a housing market acutely sensitive to elevated rates. Britain faces structural services inflation that has proven unusually persistent.

Fiscal policy divergence. Defense spending increases are universal but unequal. Industrial subsidies are generating trade tensions within the G7 itself. Energy transition expenditures vary enormously. The US fiscal position is expansionary; Japan's is constrained by debt dynamics; Europe faces country-by-country fiscal rules that limit coordinated stimulus.

Energy security divergence. The energy shock has affected G7 members very differently. The United States, a net energy exporter, is simultaneously experiencing higher domestic prices and improved terms of trade for its energy sector. Europe's dependence on imported energy makes it structurally more vulnerable. Japan, with virtually no domestic energy production, faces acute exposure to prolonged Strait of Hormuz disruptions.

Political economy divergence. The level of tolerance for elevated inflation versus elevated unemployment varies across G7 electorates. This divergence constrains the range of politically feasible policy responses in each country, limiting the scope for genuine multilateral coordination.

VI.iii.  The G7 Finance Ministers' Pre-Summit Communiqué

The May 19, 2026 communiqué from G7 Finance Ministers and Central Bank Governors — issued six days before this paper's submission and four weeks before the leaders' summit — provides the most authoritative public signal of the likely Évian agenda. The communiqué stated that central banks are strongly committed to maintaining price stability and to ensuring the continued resilience of the financial system, with monetary policy to remain data dependent, and called for achieving balanced and sustainable global growth through a reduction of global imbalances.

The G7 finance ministers sought to find common ground on tackling global economic tensions and coordinating critical raw material supplies, but divisions within the G7 complicated efforts to project unity ahead of the June 15–17 leaders' summit. IMF chief Kristalina Georgieva, attending the Paris meeting, warned: "Don't put in place measures that would make the situation worse."

That warning — measured, practical, and deliberately non-committal — may be the most honest summary of the G7's current state of ambition. In conditions of this degree of uncertainty, avoiding active harm may be a more achievable summit objective than delivering positive coordinated stimulus.

VI.iv.  Structural Recommendations for Summit Policymakers

On the basis of this analysis, the following structural recommendations are offered for consideration by summit delegations.

On inflation and monetary policy: The G7 should issue a strong collective reaffirmation of central bank independence as a foundational commitment, explicitly resisting political pressure on monetary policy in any member economy. The Warsh appointment and its political context create a specific vulnerability to credibility erosion that a G7-level statement of principle could help partially offset. The communiqué should explicitly acknowledge that rate cuts are not appropriate in the current inflation environment and should reaffirm the primacy of price stability mandates across all member economies.

On energy security: A coordinated G7 strategic petroleum reserve release — calibrated to provide measurable near-term price relief without depleting buffers needed for further escalation — should be considered as a complement to monetary restriction. Price relief through supply-side action reduces the cost to growth of achieving the same inflationary restraint through monetary tightening alone. Additionally, immediate G7 engagement on Strait of Hormuz security — through naval coordination and diplomatic channels — would reduce the geopolitical risk premium embedded in oil prices, which no amount of monetary policy can address directly.

On fiscal coordination: G7 governments should commit to a medium-term fiscal consolidation framework that does not conflict with the monetary tightening currently necessary. The current monetary-fiscal divergence — in which central banks tighten while governments expand — is a structural source of inflationary persistence that coordination can partially address. This does not require immediate austerity, but it does require credible multi-year consolidation plans that demonstrate a commitment to reducing structural deficits once the energy shock has passed.

On expectations management: The G7 should formally acknowledge the Bayesian updating dynamic as a collective policy concern — recognizing that repeated shocks across multiple members create aggregate expectation risks that no single central bank can fully address domestically. The development of a coordinated G7 communication framework for managing inflation expectations in periods of repeated geopolitical shocks represents a genuine institutional gap that France's presidency is well-positioned to address.

On economic architecture reform: The French presidency has identified macroeconomic imbalances as a defining priority, emphasizing that these imbalances can fuel trade tensions and pose a threat to global economic and financial stability, as they can trigger large and sudden corrections in capital flows and exchange rates. A G7 commitment to work through the IMF toward an orderly reduction of global imbalances — particularly the US current account deficit and the surplus positions of Germany and Japan — would address a structural vulnerability that amplifies the transmission of geopolitical shocks into financial market volatility.

VII. Conclusion: The End of the "Temporary Shock" Era

The most important implication of the current conjuncture — crystallized by Governor Waller's May 22 Frankfurt speech and the simultaneous inauguration of Chair Warsh — is conceptual rather than merely operational.

The Federal Reserve, and by extension the G7's collective monetary establishment, is being forced to acknowledge that inflation dynamics in the post-globalization, post-pandemic, geopolitically fractured world behave fundamentally differently from those of the prior era. The question Waller posed explicitly — "If people know that each shock in a sequence of price shocks is transitory, then why might they expect average inflation to increase in the future when observing this sequence?" — is the defining analytical challenge of this moment. It has no comfortable answer within the standard inflation-targeting framework.

The evidence as of May 23, 2026 is stark. Headline CPI stands at 3.8%, core at 2.8%, with the monthly pace of core acceleration at its highest since January 2025. The Survey of Professional Forecasters projects 6% headline inflation for Q2 2026. The incoming Fed chair was sworn in the same morning that his predecessor on the Board declared that the next policy move is as likely to be a hike as a cut. The G7 Finance Ministers met four days ago and could agree on nothing more than a commitment to "data dependence."

This is not a normal cyclical inflation episode. It is a stress test of the entire post-1980s framework of inflation-targeting credibility, institutional independence, and rules-based macroeconomic governance — applied simultaneously and under conditions of acute geopolitical distress.

Three things are now clear.

First, the era in which central banks could confidently and repeatedly classify inflationary episodes as temporary has ended. The fifth consecutive inflationary shock in five years has permanently altered the prior distribution that monetary authorities and market participants use to assess future inflation. Whether or not the current Bayesian drift in medium-term expectations becomes a full deanchoring of long-run expectations depends critically on policy actions taken in the next two to four quarters.

Second, the G7 Summit at Évian is not merely a diplomatic event. It is a pivotal opportunity to demonstrate that the advanced economies can coordinate effectively in conditions of genuine adversity — not just crisis management after the fact, but proactive architecture that reduces the systemic fragility exposed by the current episode. Failure to demonstrate this capacity will itself function as a signal that reinforces the adverse Bayesian update: that the system is structurally unable to manage repeated inflationary shocks, which implies that inflation will be persistent.

Third, and most fundamentally, price stability in the current environment is not merely an economic target. It is a condition of social and political sustainability. Real wages are already declining. Developing economies face projected inflation of 5.1% in 2026, with growth deteriorating as higher prices for essentials weigh on incomes. The distributional consequences of sustained above-target inflation fall most heavily on the households least able to hedge against it — amplifying the political pressures that already threaten institutional independence in several G7 democracies.

The Federal Reserve under Chair Warsh, the G7 central bank governors assembled in Évian, and the finance ministers who accompany them all face the same fundamental challenge: to demonstrate that rules-based, institutionally anchored monetary policy can navigate a world that no longer provides the stable, low-shock environment that framework was designed for. Meeting that challenge will require not just technical competence, but genuine strategic coordination — and the political courage to prioritize long-run credibility over short-run relief.

That is the message this paper offers to Évian.

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This paper was prepared using data current through May 23, 2026. Key sources include Federal Reserve Board speeches and FOMC minutes, Bureau of Labor Statistics CPI releases, World Bank Commodity Markets Outlook (April 2026), OECD Economic Outlook statements, G7 Finance Ministers' Communiqué (May 19, 2026), ECB Governing Council statements, and reporting from Bloomberg, CNBC, Reuters, and the Financial Times.

Order, Power, and the Bayesian Imperative: A Game-Theoretic Analysis of the Emerging Global Geostrategic Equilibrium

 

 

ABSTRACT

This article applies a Bayesian game-theoretic framework to analyse the structural transformation of the post-1945 rules-based international order under the second Trump administration (2025–present). Drawing on developments through May 2026 — including Operation Absolute Resolve in Venezuela (January 2026), the emergence of the so-called “Donroe Doctrine,” the NATO Hague Summit’s agreement on a 5% GDP defence spending benchmark, the US–China tariff truce brokered at the October 2025 Busan APEC summit, and the Trump–Xi bilateral meetings in Beijing in May 2026 — the article argues that American grand strategy has undergone a profound epistemic revision. Washington has updated its prior belief that liberal multilateral institutions constitute the optimal mechanism for sustaining American primacy and has instead adopted an increasingly transactional, coercive, and sphere-of-influence-oriented conception of order more reminiscent of 19th-century balance-of-power politics than post-Cold War liberal internationalism.

The article conceptualises this transformation not as policy incoherence, but as a Bayesian strategic adaptation to accumulated systemic shocks: Chinese industrial and technological revisionism, Russian military assertiveness, domestic political polarisation within the United States, alliance burden asymmetries, fiscal constraints, and declining confidence in universalist institutionalism. Through a sequential game-theoretic analysis, the study examines how this strategic revision manifests across four principal theatres: the Western Hemisphere, the Euro-Atlantic domain, the Middle East, and the Indo-Pacific. Particular attention is devoted to signalling behaviour, credibility formation, deterrence equilibria, and the informational asymmetries shaping contemporary interstate bargaining.

The article further evaluates the equilibrium implications of the emerging order for middle powers, G20 governance, and alliance structures. It argues that the transition from unipolarity to competitive multipolarity is no longer cyclical or temporary, but structurally entrenched in the near-to-medium term. In such an environment, states increasingly optimise through hedging strategies, selective alignment, and strategic diversification rather than exclusive bloc loyalty. The study concludes that the emerging international system is characterised less by the collapse of order than by the transition from a universalist hegemonic order to a fragmented equilibrium of negotiated spheres, constrained interdependence, and probabilistic deterrence.

Keywords: Bayesian game theory, rules-based international order, Trump Doctrine, Monroe Doctrine, multipolarity, US grand strategy, NATO, Indo-Pacific, geostrategic equilibrium, sphere of influence.

I. Introduction: The Structural Stakes of a Paradigm Shift

Few transformations in modern international politics have generated as much scholarly controversy, institutional anxiety, and strategic uncertainty as the accelerating erosion of the post-1945 rules-based international order (RBIO) under the second Trump administration. Between January 2025 and May 2026, the United States withdrew from or suspended participation in 66 international organisations and multilateral bodies, imposed sweeping tariff regimes later invalidated by the US Supreme Court under the International Emergency Economic Powers Act (IEEPA), authorised the capture of a sitting foreign head of state during Operation Absolute Resolve in Venezuela, and repeatedly issued explicit or implicit threats of coercive action against Canada, Greenland, Colombia, Mexico, Cuba, and, during the escalating Iran crisis of 2026, Iran itself. (The White House)

Simultaneously, however, Washington expanded forward military deployments across the Indo-Pacific, negotiated a partial tariff stabilisation agreement with Beijing at the Busan APEC summit in October 2025, deepened trilateral strategic coordination with Japan and South Korea, and presided over a NATO summit in The Hague during which European allies collectively accepted a politically transformative defence benchmark of 5% of GDP by 2035. The coexistence of retrenchment and expansionism, institutional disengagement and alliance consolidation, unilateral rhetoric and selective strategic bargaining presents a central analytical puzzle: does contemporary American foreign policy represent strategic incoherence, or does it instead reflect the emergence of a new organising logic for US grand strategy?

A substantial portion of the contemporary policy literature interprets the second Trump administration through the prism of volatility and personalism. Former National Security Adviser John Bolton famously characterised Trump’s foreign policy approach during the first administration as lacking any “grand conceptual framework,” describing it instead as a sequence of improvisational decisions driven by immediate political incentives. Yet such interpretations, while not entirely unfounded, risk conflating tactical unpredictability with strategic irrationality. In game-theoretic terms, stochastic signalling behaviour may itself serve a rational deterrence function under conditions of incomplete information.

This article advances a different interpretation. It argues that beneath the rhetorical turbulence and episodic policy reversals lies a discernible Bayesian equilibrium logic. The administration appears to have updated its prior beliefs regarding the utility, sustainability, and strategic efficiency of the liberal international order in response to accumulated evidence over the preceding two decades. Those informational shocks include: China’s successful exploitation of globalisation without political liberalisation; Russia’s use of military force to revise territorial boundaries in Europe; the growing fiscal burden of alliance maintenance; the weaponisation of economic interdependence; domestic backlash against globalisation within advanced democracies; and the perception that multilateral institutions increasingly constrain American freedom of manoeuvre without reliably advancing American strategic interests.

Within a Bayesian framework, states are not assumed to possess fixed strategic doctrines. Rather, they continuously revise their beliefs based on observed outcomes, updated probabilities, and evolving payoff structures. The second Trump administration can therefore be interpreted as engaging in a process of strategic posterior updating. Its underlying conclusion appears to be that the assumptions governing post-Cold War liberal hegemony — namely that economic integration would liberalise authoritarian rivals, that institutional interdependence would mitigate geopolitical competition, and that alliance networks would remain indefinitely asymmetrical in Washington’s favour — have proven either incomplete or false.

This epistemic revision has generated a corresponding transformation in American best-response functions. The administration increasingly prioritises three objectives: first, the consolidation of hemispheric dominance within the Western Hemisphere; second, the externalisation of security burdens onto allies and partners; and third, transactional bargaining with peer competitors rather than universalist institutional management. Such a strategy does not necessarily imply isolationism. Rather, it represents a transition from liberal hegemonic management toward coercive selective engagement — a model in which power projection is preserved, but normative commitments become conditional, instrumental, and explicitly subordinated to perceived national advantage.

The implications of this transformation extend well beyond the United States itself. The post-1945 order was not merely a diplomatic architecture; it constituted the informational and institutional infrastructure through which global expectations were coordinated. International trade regimes, reserve currency stability, maritime security guarantees, alliance credibility, and investment flows all depended, to varying degrees, upon assumptions regarding American strategic predictability and institutional commitment. Once those assumptions weaken, states rationally begin recalculating their own strategic positions under conditions of increased uncertainty.

Consequently, the emerging global environment increasingly resembles a system of competitive probabilistic balancing rather than hierarchical hegemonic stability. Middle powers pursue hedging strategies. Regional actors expand autonomous defence capabilities. Economic interdependence becomes securitised. Supply chains are reorganised around geopolitical resilience rather than pure efficiency. Alliance structures persist, but their underlying logic changes from trust-based permanence to conditional reciprocity. The resulting system is neither a complete return to classical balance-of-power politics nor a continuation of post-Cold War unipolarity. It is instead a hybrid order characterised by fragmented spheres of influence, negotiated interdependence, and continuous signalling contests among major powers.

This article therefore contends that the central geopolitical development of the mid-2020s is not simply the decline of liberal internationalism, but the emergence of a new equilibrium model for great-power competition under conditions of partial economic integration. The transition now underway is structural rather than episodic. Even if future administrations partially reverse elements of Trump-era policy, the informational shocks that catalysed this transformation — particularly the rise of China and the perceived limits of liberal institutionalism — are unlikely to disappear. In Bayesian terms, the posterior distribution has already shifted.

The article proceeds in nine sections. Section II examines the historical origins, structural functions, and internal contradictions of the post-war rules-based order. Section III analyses the domestic and systemic drivers behind the Trump administration’s strategic revision. Section IV evaluates the Western Hemisphere through the lens of the emerging “Donroe Doctrine” and renewed American hemispheric assertiveness. Section V analyses the restructuring of Euro-Atlantic relations and the transformation of NATO burden-sharing dynamics. Section VI examines the Middle East as a theatre of selective disengagement and coercive balancing. Section VII assesses the Indo-Pacific as the administration’s principal long-term strategic theatre. Section VIII theorises the equilibrium characteristics of the emerging multipolar system and explores implications for G20 governance and middle-power strategy. Section IX concludes with broader theoretical and policy implications.

II. The Architecture of the Post-War Order: Origins, Functions, and Structural Contradictions

The rules-based international order that emerged after the Second World War was neither historically inevitable nor politically neutral. It represented the institutionalisation of American primacy at a unique moment of material asymmetry in world history. By 1945, the United States possessed approximately half of global industrial output, unmatched naval supremacy, a monopoly on atomic weapons, and an intact domestic industrial base while much of Eurasia lay physically devastated. The architecture subsequently constructed — including the Bretton Woods system, the United Nations, the General Agreement on Tariffs and Trade (GATT), later the World Trade Organization (WTO), the International Monetary Fund (IMF), the World Bank, and NATO — reflected this extraordinary concentration of American structural power.

The order’s durability stemmed not merely from coercion, but from its capacity to provide public goods at a scale no previous hegemon had achieved. The United States underwrote maritime security, guaranteed reserve currency stability through the dollar system, supported relatively open trade networks, and constructed institutional mechanisms that reduced transaction costs and mitigated interstate uncertainty among participating states. For Western Europe and Japan in particular, the arrangement produced unprecedented prosperity and security. Even many non-aligned or adversarial states indirectly benefited from the stability generated by American naval dominance and the predictability of global financial structures.

However, the RBIO was always characterised by an inherent duality: it presented itself as universalist while operating selectively according to strategic interests. Liberal norms were promoted unevenly, and international law was frequently subordinated to geopolitical imperatives. The United States bypassed or stretched international legal frameworks in Kosovo, Iraq, Afghanistan, Libya, and elsewhere when policymakers deemed core interests sufficiently compelling. This contradiction did not necessarily invalidate the order, but it demonstrated that the RBIO functioned less as a genuinely impartial legal system than as a hegemonic order constrained by partial norms.

Its legitimacy therefore rested less upon moral consistency than upon comparative utility. For many states, American predominance appeared preferable to the alternatives. The order generated growth, reduced great-power warfare among major industrial democracies, facilitated global trade expansion, and created a relatively predictable environment for capital accumulation and technological exchange. Crucially, the system also benefited from the absence of a credible peer competitor after the collapse of the Soviet Union in 1991. The unipolar moment enabled Washington to universalise its preferred institutional arrangements with relatively limited resistance.

Yet the structural foundations of this order began eroding long before Trump’s return to office in 2025. Three developments proved especially consequential.

First, China’s integration into the global economy fundamentally altered the strategic assumptions underpinning liberal globalisation. China’s accession to the WTO in 2001 was justified by what may be termed the “convergence thesis” — the belief that sustained economic integration would gradually liberalise China politically and socially. Instead, Beijing combined state capitalism, industrial policy, technological acquisition, and authoritarian political control to generate a historically unprecedented rise in comprehensive national power. Western firms gained access to Chinese markets and low-cost manufacturing, but China simultaneously accumulated industrial depth, technological capability, financial leverage, and geopolitical influence. Rather than becoming a stakeholder fully socialised into the liberal order, Beijing increasingly emerged as a revisionist competitor operating within — and partially against — the very system that facilitated its rise.

Second, Russia’s actions in Georgia (2008), Crimea (2014), and Ukraine (2022 onward) undermined assumptions that territorial conquest and revisionist military behaviour had become obsolete among major powers. The inability of international institutions to deter or reverse these actions exposed the limits of norm-based enforcement when confronting nuclear-armed states willing to absorb economic costs for geopolitical objectives. The Ukraine war, in particular, demonstrated that industrial warfare, resource competition, and geopolitical spheres of influence remained central features of international politics despite decades of liberal optimism.

Third, domestic political conditions within Western democracies increasingly turned against the social foundations of liberal internationalism. Deindustrialisation, regional inequality, migration pressures, and perceptions of elite detachment generated populist backlashes across Europe and North America. In the United States, these dynamics converged with growing fiscal concerns regarding alliance commitments and overseas military expenditures. Large segments of the American electorate began questioning whether the costs of maintaining the liberal order remained proportionate to its benefits.

The second Trump administration emerged directly from this environment of cumulative disillusionment. Its worldview reflects not merely ideological nationalism, but a deeper scepticism toward the informational assumptions that guided post-Cold War strategy. Administration officials increasingly argue that liberal institutionalism enabled strategic free-riding by allies, facilitated Chinese economic expansion at American expense, and constrained US sovereignty without effectively deterring adversaries. The administration’s January 2026 decision to withdraw from or suspend participation in 66 international organisations symbolised this broader epistemic break with liberal multilateralism. (The White House)

This reassessment is also evident in the administration’s approach to economic sovereignty. The extensive tariff regime imposed under the IEEPA reflected an attempt to reassert executive flexibility in economic statecraft and reduce dependence on multilateral trade frameworks. Yet the subsequent Supreme Court decision invalidating those tariffs demonstrated that domestic constitutional constraints continue to shape the boundaries of strategic revisionism. (PwC) The resulting tension between executive geopolitical ambition and institutional constitutionalism has itself become a defining feature of the emerging American strategic posture.

The administration’s November 2025 National Security Strategy crystallised this intellectual transformation. Rather than framing the United States as the guarantor of a universal liberal order, the document reportedly emphasised “core national interests,” “strategic reciprocity,” industrial resilience, hemispheric security, and competitive coexistence among major powers. In effect, the United States appears increasingly willing to accept a pluralistic and hierarchical international environment in which different great powers dominate distinct regional spheres while bargaining pragmatically to avoid uncontrolled escalation.

From a Bayesian perspective, this shift represents an updating process rather than an abrupt ideological rupture. The post-Cold War priors — liberal convergence, institutional deterrence, economic interdependence as pacification, and indefinite American primacy — have been weakened by observed outcomes. The strategic posterior that emerges is therefore more realist, more transactional, and considerably less universalist.

Whether this adaptation ultimately stabilises the international system or accelerates fragmentation remains uncertain. What is increasingly clear, however, is that the historical phase commonly associated with uncontested liberal hegemony has ended. The central question confronting policymakers is no longer how to preserve the post-1991 order in its original form, but how states will behave within the competitive equilibrium now emerging in its aftermath.

III. Bayesian Updating and the Logic of Strategic Revision

Bayesian game theory provides a particularly useful analytical framework for interpreting the strategic recalibration undertaken by the second Trump administration because it is specifically designed for environments characterised by incomplete information, uncertainty regarding actor intentions, and continuous belief revision. In Bayesian terms, political actors do not operate with perfect knowledge of their adversaries’ capabilities, resolve, or long-term objectives. Instead, states maintain probabilistic beliefs — or priors — regarding the likely behaviour and “types” of other actors, updating those beliefs dynamically as new information becomes available. Strategic equilibria therefore emerge not from static assumptions, but from sequential adaptation under conditions of uncertainty.

Applied to international politics, this framework illuminates the evolution of American grand strategy since the end of the Cold War. The post-1991 unipolar moment rested upon a series of highly optimistic priors embedded within the liberal internationalist consensus. Policymakers in Washington broadly assumed that economic globalisation would encourage political liberalisation; that institutional interdependence would reduce incentives for major-power conflict; that open trade regimes would generate convergent interests among leading economies; and that US military, financial, and technological dominance would remain sufficiently overwhelming to preserve a stable liberal order indefinitely.

These assumptions were not irrational within the informational environment of the 1990s. The collapse of the Soviet Union, NATO expansion, rapid global trade integration, and the apparent success of liberal democratic transitions in Eastern Europe appeared to validate them. In Bayesian terms, the posterior distribution following the Cold War strongly reinforced liberal hegemonic priors.

Yet over time, observed outcomes increasingly diverged from those expectations.

China’s accession to the World Trade Organization in 2001, initially interpreted as a mechanism for integrating Beijing into a liberal economic order, instead facilitated the rapid expansion of Chinese industrial, technological, and geopolitical power without corresponding political liberalisation. Russia’s resurgence under Vladimir Putin, culminating in the invasions of Georgia, Crimea, and Ukraine, challenged assumptions that territorial revisionism had become obsolete among major powers. Simultaneously, the wars in Iraq and Afghanistan imposed immense fiscal and political costs while eroding confidence in liberal interventionism within the American electorate itself.

Under the Obama administration, these developments generated only partial updating. The administration continued to operate broadly within the liberal institutional framework, but attempted incremental adaptation through measures such as the “Pivot to Asia,” selective retrenchment in the Middle East, the Iran nuclear agreement, and greater emphasis on alliance coordination. In Bayesian terms, Obama-era strategy represented moderate posterior adjustment while preserving the core structure of prior beliefs regarding the utility of multilateral institutions and cooperative global governance.

The first Trump administration marked a more aggressive updating process. Trump’s “America First” framework openly challenged assumptions underlying liberal internationalism, particularly regarding free trade, alliance asymmetries, immigration, and globalisation. Nevertheless, the first administration remained partially constrained by institutional inertia and competing elite coalitions within the American state apparatus. Senior officials from more traditional Republican internationalist backgrounds — including figures within the Departments of Defense and State — moderated or delayed several proposed strategic ruptures. Congressional resistance, judicial oversight, bureaucratic continuity, and the widespread expectation that Trump represented a temporary deviation from post-Cold War orthodoxy further limited the depth of strategic transformation.

The second Trump administration differs qualitatively because it entered office with both substantially revised priors and significantly weaker institutional constraints. The cumulative informational shocks of the preceding decade — including the US–China trade conflict of 2017–2021, the chaotic withdrawal from Afghanistan in 2021, the inability of conventional deterrence to prevent Russia’s 2022 invasion of Ukraine, intensifying industrial competition with China, and the domestic political success of nationalist-populist narratives — appear to have produced a far more profound epistemic revision within the administration and its broader policy coalition.

In Bayesian terms, the administration’s posterior distribution regarding the utility of the rules-based international order shifted decisively. Liberal institutionalism increasingly came to be viewed not as a force multiplier for American power, but as a mechanism through which rivals exploited American openness while allies free-rode on American security guarantees. Economic interdependence was reinterpreted less as a stabilising force than as a vector of vulnerability. Globalisation itself became securitised.

This transformation produced a corresponding change in America’s strategic best-response function. Rather than attempting to maximise universal institutional legitimacy, the administration increasingly appears focused on maximising relative strategic flexibility under conditions of competitive multipolarity. Three interrelated strategic pillars have consequently emerged.

First, the administration has prioritised the consolidation of exclusive American dominance within the Western Hemisphere, treating the region not merely as an area of influence but as an essential strategic sanctuary insulated from external great-power penetration. The revival of Monroe Doctrine logic — rebranded by some analysts as the “Donroe Doctrine” — reflects this hemispheric prioritisation.

Second, Washington has aggressively pursued burden-shifting toward formal allies, particularly in Europe and parts of the Middle East. The objective is not necessarily alliance dissolution, but rather the reduction of American marginal costs in secondary theatres. The NATO Hague Summit’s 5% GDP defence benchmark symbolises this broader strategic logic: allies are expected to internalise a substantially greater share of regional security costs while the United States reallocates fiscal and military resources toward long-term competition with China.

Third, the administration has adopted an increasingly transactional approach toward Beijing itself. This posture differs from both classical containment and liberal engagement. Instead, it reflects a form of calibrated competitive bargaining in which economic coercion, tariff pressure, technological restrictions, and military deterrence coexist alongside selective negotiation and partial cooperation. The October 2025 Busan tariff truce and the May 2026 Trump–Xi meetings in Beijing illustrate this hybrid approach. The administration appears to view China neither as a partner to be integrated nor as an enemy to be fully isolated, but as a rival great power with whom coexistence must be continually renegotiated through shifting leverage relationships.

Importantly, Bayesian rationality does not require doctrinal transparency. Traditional grand strategy often relied upon stable declaratory doctrines designed to reduce uncertainty and reassure allies. By contrast, the strategic logic emerging under the second Trump administration frequently weaponises uncertainty itself. Ambiguity regarding American commitments, thresholds, and potential responses functions as a coercive signalling mechanism.

From a game-theoretic perspective, strategic unpredictability can increase bargaining leverage under certain conditions. If adversaries and allies alike remain uncertain regarding the probability distribution governing American responses, they are incentivised to behave more cautiously. States hedge against worst-case scenarios by increasing defence spending, diversifying alliances, reshoring critical industries, and avoiding actions that could trigger disproportionate retaliation.

This dynamic is visible across multiple theatres simultaneously. European states accelerated rearmament after repeated Trump-era threats to weaken NATO guarantees. Canada increased strategic discussions regarding Arctic sovereignty and defence modernisation following repeated annexation rhetoric from Washington. Gulf monarchies intensified hedging behaviour between Washington and Beijing amid uncertainty regarding long-term US commitments in the Middle East. Indo-Pacific partners deepened regional defence coordination while simultaneously seeking to avoid direct economic decoupling from China.

However, the same uncertainty that generates coercive leverage also imposes systemic costs. In classical liberal institutional theory, stable expectations reduce transaction costs and increase cooperative surplus. Under conditions of heightened uncertainty, by contrast, states devote increasing resources toward insurance mechanisms, redundancy, strategic autonomy, and military preparedness. The result is a reduction in the overall efficiency of the international system even when open conflict is avoided.

The emerging equilibrium therefore appears increasingly characterised by three features: strategic hedging, fragmented interdependence, and probabilistic deterrence. Rather than aligning permanently with a single bloc, states seek flexible positioning between competing centres of power. Economic integration persists, but becomes progressively subordinated to national security calculations. Deterrence itself becomes less rule-based and more psychological, relying heavily upon signalling contests under incomplete information.

The long-term stability of such an equilibrium remains uncertain. Bayesian systems can generate adaptive resilience, but they can also amplify miscalculation if actors update on inaccurate signals or misinterpret strategic intentions. In a multipolar environment characterised by high informational noise, escalating economic securitisation, and declining institutional trust, the probability of signalling failures increases substantially.

Consequently, the central danger of the emerging order may not be deliberate great-power war, but rather cumulative instability produced by imperfect information, asymmetric updating, and strategic overreaction. The international system is entering a phase in which uncertainty itself has become a principal instrument of statecraft.

IV. The Donroe Doctrine and the Western Hemisphere as Strategic Core

IV.i.  Historical Antecedents and the Trump Corollary

The Monroe Doctrine of 1823 established one of the foundational principles of American grand strategy: the Western Hemisphere would be treated as a privileged sphere of US influence from which external great powers were to be excluded. Initially articulated as a warning against renewed European colonial expansion in the Americas, the doctrine gradually evolved into a broader geopolitical framework legitimising American primacy throughout the hemisphere.

During the 19th and early 20th centuries, successive administrations operationalised this principle through an expanding mixture of diplomatic coercion, economic leverage, intelligence operations, and direct military intervention. The Roosevelt Corollary transformed the doctrine from a defensive warning into an active justification for interventionism, particularly in the Caribbean and Central America. Throughout the Cold War, the containment of Soviet influence further reinforced the hemisphere’s strategic centrality within American planning.

Following the collapse of the Soviet Union, however, the relative importance of the Western Hemisphere declined within US grand strategy. Washington increasingly concentrated its strategic attention on Eurasia, the Middle East, and the broader liberal-internationalist project of integrating former adversaries into a globalised economic order. Hemispheric management became comparatively secondary to counterterrorism, NATO expansion, Middle Eastern interventions, and the integration of China into global markets.

The second Trump administration represents a significant reversal of this post-Cold War orientation. The 2025 National Security Strategy effectively resurrected a hemispheric logic reminiscent of earlier Monroe Doctrine traditions while simultaneously adapting it to contemporary great-power competition. What several analysts now term the “Trump Corollary” — or more colloquially, the “Donroe Doctrine” — reframes the Western Hemisphere not merely as an area of preferential influence, but as a strategic sanctuary whose political, economic, and technological infrastructure must remain insulated from external rivals, particularly China and Russia.

The administration’s declaratory language reflects this shift with unusual explicitness. The NSS reportedly emphasises that the United States will “reassert and enforce the Monroe Doctrine to restore American preeminence in the Western Hemisphere,” while preventing “non-Hemispheric competitors” from obtaining strategically significant positions within the region. Such language marks one of the clearest official rejections of post-Cold War universalism in favour of explicit sphere-of-influence politics by a major Western power in decades.

The strategic rationale underlying this revision is multifaceted.

Chinese economic expansion throughout Latin America and the Caribbean has accelerated significantly over the past fifteen years. Beijing has developed extensive infrastructure, telecommunications, mining, energy, and port investments across the hemisphere through state-backed financing and Belt and Road initiatives. Chinese commercial influence in Panama, Venezuela, Cuba, Brazil, Peru, and elsewhere increasingly intersects with strategic concerns regarding dual-use infrastructure, critical minerals, cyber networks, and maritime logistics.

Simultaneously, Russia has sustained security and intelligence relationships with several anti-American governments in the region, particularly Venezuela, Cuba, and Nicaragua. Although Moscow lacks the economic weight necessary to compete comprehensively with China or the United States in Latin America, its strategic presence nevertheless reinforces Washington’s perception that geopolitical competition has returned directly to the hemisphere itself.

From the administration’s perspective, these developments represent a direct challenge to long-standing American strategic assumptions. The Donroe Doctrine therefore constitutes not merely rhetorical nationalism, but a broader attempt to restore geopolitical depth and deny adversarial powers forward operating positions near the continental United States.

IV.ii   Operation Absolute Resolve and the New Coercive Precedent

The clearest operational manifestation of this doctrine emerged on 3 January 2026 with Operation Absolute Resolve: the capture of Venezuelan President Nicolás Maduro by US military and federal law enforcement personnel in Caracas and his subsequent transfer to New York to face criminal proceedings. The operation represented one of the most dramatic assertions of unilateral American coercive power since the Cold War.

The geopolitical significance of the operation extended well beyond Venezuela itself. Symbolically, it demonstrated the administration’s willingness to treat hostile governments within the hemisphere not merely as adversaries to be sanctioned or diplomatically isolated, but as targets for direct coercive intervention. The State Department’s subsequent declaration — “This is OUR Hemisphere and President Trump will not allow our security to be threatened” — reflected a strikingly explicit articulation of sphere-of-influence politics rarely expressed so openly by contemporary Western governments.

From an international legal perspective, the operation constituted a major escalation in the erosion of norms regarding sovereignty and non-intervention. Previous instances of regime change or leadership targeting by major powers typically relied upon broader coalition frameworks, humanitarian justifications, counterterrorism narratives, or covert mechanisms designed to preserve at least partial deniability. Operation Absolute Resolve, by contrast, openly asserted hemispheric prerogative as sufficient strategic justification.

The operation also carried substantial signalling implications. In Bayesian terms, Washington altered the informational environment confronting both allies and adversaries. By demonstrating a willingness to employ direct coercive action against a sitting head of state, the administration increased the perceived credibility of future threats throughout the region. States previously uncertain regarding the administration’s resolve were forced to revise their probability estimates accordingly.

This signalling effect was reinforced by subsequent rhetoric directed toward additional states. Public references to Colombia, Cuba, Mexico, Greenland, and even Canada suggested that the administration intended to maintain deliberate ambiguity regarding the outer boundaries of acceptable geopolitical behaviour within the hemisphere. Although many of these statements were likely designed more for psychological leverage than literal territorial revisionism, their strategic effect nevertheless altered regional calculations.

At the same time, coercion has been complemented by selective patronage. The administration’s extensive financial support package for Argentina under President Javier Milei illustrated the dual-track nature of the emerging doctrine: adversarial governments face escalating pressure, while ideologically aligned or strategically cooperative governments may receive preferential economic and diplomatic treatment.

This combination of coercion and patronage resembles classical imperial balancing mechanisms more than post-Cold War liberal governance. The objective is not universal institutional integration, but rather the creation of a politically manageable regional hierarchy aligned with American strategic priorities.

IV.iii. Greenland, Canada, and the Territorialisation of Strategic Signalling

The territorial dimension of the administration’s hemispheric revisionism extends beyond Latin America into the Arctic and North American space itself. Nowhere is this more evident than in the administration’s increasingly assertive posture toward Greenland.

American interest in Greenland is not historically unprecedented. Successive US administrations have recognised the island’s immense strategic significance due to its Arctic location, proximity to North Atlantic sea lanes, missile defence infrastructure, and growing relevance within emerging Arctic trade and resource competition. Climate change and polar ice melt have further increased Greenland’s geopolitical value by expanding access to critical minerals and potential maritime routes.

What distinguishes the second Trump administration is the degree of explicitness with which acquisitionist rhetoric has been normalised. Vice President Vance’s March 2025 visit to Greenland, combined with public messaging from senior administration figures suggesting eventual American ownership, transformed what had once been treated as a speculative geopolitical curiosity into an active signalling campaign.

The reaction from European allies revealed the seriousness with which such rhetoric was interpreted abroad. Danish Prime Minister Mette Frederiksen’s warning that military action against a NATO ally “would end everything” underscored the existential implications perceived by European governments. Even absent actual annexation attempts, the mere introduction of territorial ambiguity into relations among NATO allies represented a profound departure from post-1945 norms governing Western alliance cohesion.

Canada occupies an even more sensitive position within this signalling environment. Trump’s repeated suggestions that Canada should become the “51st state,” although often dismissed domestically within the United States as rhetorical provocation, carried significant strategic implications internationally. Combined with disputes over Arctic sovereignty, defence spending, energy policy, and continental security integration, such statements contributed to growing Canadian concerns regarding long-term American strategic unpredictability.

From a purely material standpoint, there is little evidence that outright territorial annexation enjoys substantial domestic support within the United States. Polling throughout 2025 indicated strong public opposition to expansionist military adventures, with only marginal support for coercive territorial enlargement. Yet the primary function of these statements may not be literal annexationism.

Rather, their significance lies in strategic signalling.

In Bayesian terms, the administration appears to be deliberately increasing uncertainty regarding its reservation points, escalation thresholds, and long-term ambitions. Such ambiguity serves multiple purposes simultaneously: it reinforces perceptions of dominance, tests the psychological resilience of counterparts, compels allied governments to internalise greater security responsibilities, and shifts negotiations onto terrain defined increasingly by American initiative rather than institutional procedure.

The resulting dynamic contributes to a broader transformation in hemispheric politics. The Western Hemisphere is increasingly being reframed not as a cooperative liberal community, but as a core strategic zone governed by asymmetric power relationships and conditional sovereignty. Whether this transformation remains primarily rhetorical or evolves into a durable structural doctrine will significantly shape the future trajectory of North American and hemispheric geopolitics.

V. NATO, the Euro-Atlantic Alliance, and the Burden-Sharing Equilibrium

V.i.  From Commitment to Conditionality

The transformation of the US–NATO relationship during the second Trump administration represents the most consequential restructuring of the Atlantic alliance since its founding in 1949. For nearly eight decades, NATO’s strategic credibility rested upon a central assumption: that American security guarantees, while occasionally debated domestically, remained fundamentally unconditional at the operational level. Article 5 functioned not merely as a legal commitment, but as a psychological and geopolitical certainty underpinning European strategic calculations, investment flows, military planning, and deterrence architecture throughout the Euro-Atlantic space.

The second Trump administration has altered this foundational assumption. Rather than treating alliance commitments as quasi-sacrosanct obligations embedded within a broader liberal order, the administration increasingly frames NATO through a transactional lens rooted in reciprocity, cost-efficiency, and burden redistribution. Trump’s repeated declaration — “If they don’t pay, I’m not going to defend them” — constitutes more than rhetorical provocation. It signals a qualitative shift from alliance solidarity toward conditional security provision.

From a game-theoretic perspective, this represents a fundamental alteration in the alliance equilibrium. During the post-Cold War era, European allies operated under the expectation that American commitments remained highly credible regardless of short-term burden asymmetries. This created what economists and strategic theorists would characterise as a partial moral hazard structure: many European states rationally underinvested in defence because the marginal probability of US protection remained extremely high even under conditions of uneven contributions.

The second Trump administration has attempted to revise those incentive structures by deliberately injecting uncertainty into the credibility of American commitments. In Bayesian terms, Washington altered the probability distribution governing allied expectations. European governments could no longer assume with complete confidence that US protection would remain automatic under all contingencies. The resulting uncertainty compelled substantial updating across the alliance.

The clearest manifestation of this recalibration emerged at the NATO Hague Summit in June 2025, where alliance members agreed to an unprecedented defence expenditure benchmark of 5% of GDP by 2035, replacing the longstanding 2% target that itself had often gone unmet. This decision represented one of the most dramatic accelerations of European militarisation since the Cold War. NATO Secretary General Mark Rutte characterised 2025 as witnessing a “20 percent surge” in defence spending across Europe and Canada relative to the previous year, reflecting the scale of strategic anxiety generated by both Russian aggression and uncertainty regarding long-term American reliability.

The implications of this transformation extend beyond budgetary metrics alone. European governments increasingly began reassessing assumptions regarding industrial capacity, ammunition stockpiles, energy security, logistics networks, and strategic autonomy. Germany accelerated rearmament initiatives previously considered politically implausible. Poland emerged as one of Europe’s most heavily militarising states. France intensified calls for greater European defence sovereignty. Even historically restrained Nordic states expanded long-term military planning under the assumption that the European security environment had entered a structurally more dangerous phase.

Paradoxically, the administration’s coercive alliance rhetoric may therefore have succeeded in achieving one long-standing American strategic objective: compelling Europe to internalise a greater share of its own defence burden. Yet the manner in which this outcome was achieved carries significant systemic costs.

Alliance systems function not only through material capability, but through trust, predictability, and reputational consistency. Once conditionality becomes normalised, allied governments rationally begin hedging against the possibility of future abandonment. Strategic autonomy initiatives, diversification of defence procurement, regional security mini-lateralism, and independent industrial strategies all become more attractive under conditions of uncertainty.

This tension is visible within American policy itself. While the administration rhetorically questioned aspects of NATO’s utility, institutional resistance within Congress and the national security bureaucracy remained substantial. The 2026 National Defense Authorization Act (NDAA), signed in December 2025, authorised a record $901 billion defence budget — approximately $8 billion above the administration’s original request — while simultaneously including provisions restricting the executive branch’s ability to unilaterally reduce American troop deployments in Europe below 76,000 personnel without congressional consultation.

The NDAA provisions reveal an important structural reality often overlooked in overly personalised analyses of Trump-era foreign policy: American grand strategy is not determined solely by presidential rhetoric. Congress, defence institutions, alliance bureaucracies, industrial interests, and military command structures continue to exert powerful constraining effects. The resulting strategic posture therefore reflects a hybrid equilibrium — rhetorically revisionist, yet institutionally constrained.

Consequently, the contemporary Euro-Atlantic alliance should not be interpreted as collapsing, but rather as undergoing transformation from a trust-based hegemonic security order into a more explicitly negotiated burden-sharing compact. The United States remains indispensable to European security, but the terms of that indispensability are increasingly contested, conditional, and transactional.

V.ii. Ukraine and the Limits of Transactionalism

The Ukraine war provides perhaps the clearest illustration of both the effectiveness and the limitations of the administration’s transactional alliance strategy. Since Russia’s full-scale invasion in 2022, Ukraine has occupied a uniquely sensitive position within the broader architecture of European deterrence. For European governments, the conflict represents not merely a regional war, but a test case regarding the durability of the post-Cold War territorial order itself. For the Trump administration, however, Ukraine simultaneously embodies the fiscal burdens, escalation risks, and alliance asymmetries associated with prolonged overseas commitments.

The February 2025 Oval Office confrontation between Trump and Ukrainian President Volodymyr Zelensky became a defining symbolic moment in this recalibration. Zelensky’s public berating during the meeting sent shockwaves through European capitals, triggering fears that Washington might fundamentally downgrade or even abandon support for Kyiv. The episode dramatically increased uncertainty regarding the future trajectory of American policy and accelerated European efforts to expand independent military aid mechanisms.

Yet subsequent developments demonstrated the limits of outright disengagement. By March 2026, the administration announced a revised arrangement under which arms transfers to Ukraine would continue through NATO-managed channels rather than via direct bilateral framing. Officially, the administration emphasised that weapons were being transferred “to NATO” rather than directly to Ukraine, thereby preserving rhetorical flexibility while maintaining the underlying strategic commitment.

This distinction was politically and strategically significant. Domestically, it allowed the administration to maintain consistency with its “America First” narrative by reframing assistance as alliance burden-sharing rather than unilateral subsidisation. Internationally, however, the arrangement preserved the fundamental reality that American military-industrial capacity remained indispensable to Ukraine’s survival and to broader European deterrence credibility.

The episode illustrates a recurring pattern within the administration’s broader alliance management strategy: the extraction of maximum rhetorical, financial, and political concessions from allies while ultimately maintaining the strategic relationships necessary for sustaining American global influence.

Secretary General Mark Rutte’s widely discussed description of Trump as “Europe’s daddy” at the Hague Summit — although controversial and heavily criticised in parts of Europe — symbolically captured this evolving relationship dynamic. European states increasingly resent the coercive and performative dimensions of Trumpian alliance management, yet simultaneously recognise their continued dependence upon American military power.

This duality produces an unstable psychological equilibrium. The alliance persists materially while eroding emotionally.

Critics argue that the reputational damage generated by repeated conditional threats may ultimately outweigh the fiscal gains achieved through burden redistribution. Credibility in alliance systems accumulates gradually but can deteriorate rapidly. Once allies begin incorporating abandonment risk into long-term planning assumptions, the strategic architecture of deterrence itself changes.

At the same time, structural realities continue limiting the administration’s freedom of manoeuvre. NATO’s 2025 Annual Report identified Russia as “the most significant and direct threat” to alliance security while explicitly linking Moscow’s war effort to broader strategic support from China, Iran, North Korea, and Belarus. This framing reinforces the perception within large segments of the US security establishment that the European theatre cannot be cleanly separated from global great-power competition.

Congressional constraints further complicate any rapid retrenchment scenario. Bipartisan resistance to precipitous withdrawal from Europe remains substantial, particularly among legislators concerned that visible American disengagement would embolden both Russia and China simultaneously. The NDAA restrictions on troop reductions therefore represent more than procedural oversight; they embody a deeper institutional consensus that American credibility in Europe remains strategically interconnected with its global position.

The Ukraine theatre thus reveals the central contradiction of transactionalism itself. The administration seeks to reduce the costs of alliance maintenance while preserving the geopolitical advantages those alliances provide. Yet coercive bargaining over alliance commitments risks weakening the very credibility structures upon which deterrence depends. The result is a strategy that simultaneously strengthens and destabilises NATO: strengthening it materially through accelerated European militarisation while destabilising it psychologically through the normalisation of conditionality.

VI. The Middle East: Strategic Disengagement and Its Contradictions

The Middle East represents the clearest illustration of the widening gap between American retrenchment rhetoric and operational geopolitical reality. Every US administration since Barack Obama has attempted, in varying forms, to reduce American exposure to the region’s chronic instability. Each has ultimately discovered that the strategic vacuum created by disengagement generates pressures that repeatedly draw Washington back into regional affairs. The second Trump administration has reproduced this pattern with particular intensity.

The administration’s 2025 National Security Strategy reflects lessons derived from two decades of costly interventionism in Iraq and Afghanistan. Those conflicts profoundly reshaped elite and public attitudes toward large-scale military occupations, regime-change campaigns, and open-ended counterinsurgency operations. Within the administration’s strategic worldview, prolonged Middle Eastern entanglements are increasingly interpreted as diversions of finite military, fiscal, and political resources away from the primary geopolitical challenge posed by China.

Consequently, the administration officially advocates a model of regional burden-shifting in which local partners — principally Israel and the Gulf monarchies — assume primary responsibility for managing regional security dynamics with selective American support rather than direct American leadership. This approach aligns with broader Trump-era efforts to externalise security costs onto allies across multiple theatres.

In practice, however, the Middle East has proven resistant to strategic simplification.

Throughout 2025–2026, the United States remained deeply involved diplomatically, militarily, and economically across the region. The June 2025 American strikes against three Iranian nuclear facilities represented one of the most serious escalations in US-Iran tensions in years. Although the administration framed the operation as limited and preventative rather than transformational, the strikes nevertheless demonstrated Washington’s continued willingness to employ direct force to prevent major shifts in the regional balance of power.

The subsequent diplomatic effort to negotiate a twenty-year suspension of Iranian uranium enrichment further illustrates the administration’s preference for coercive diplomacy rather than full-scale military confrontation. Vice President J.D. Vance’s May 2026 declaration that “the ball is now in Iran’s court” encapsulated this broader strategic logic: calibrated coercion designed to compel bargaining without triggering indefinite military escalation.

Yet the structural contradictions underlying this strategy remain unresolved.

The administration seeks simultaneously to reduce Middle Eastern commitments and prevent adversarial regional realignments. However, these objectives increasingly conflict. Iranian nuclear ambitions, Houthi interdiction of maritime shipping routes, Syria’s fragmentation, Hezbollah’s military infrastructure, and persistent Israel-Lebanon tensions all continue generating conditions in which complete American disengagement would carry substantial geopolitical risks.

Moreover, the region has become progressively intertwined with broader great-power competition. Iran’s growing strategic coordination with Russia and China complicates the administration’s effort to compartmentalise regional crises. Moscow’s military relationships and Beijing’s expanding economic presence transform Middle Eastern instability from a purely regional issue into part of a wider multipolar contest.

The administration’s diplomatic initiatives likewise reflect this contradiction between retrenchment and engagement. The brokering of rare direct talks between Lebanon and Israel in Washington during 2026 represented a notable diplomatic achievement. Yet those negotiations were immediately constrained by Hezbollah’s opposition, Iranian influence, and the broader regional polarisation shaping Levantine politics.

The Middle East therefore functions as a theatre of managed contradiction. Official doctrine emphasises retrenchment, regional self-management, and strategic prioritisation of the Indo-Pacific. Operational reality, however, repeatedly compels renewed American involvement.

From a Bayesian perspective, this reflects the difficulty of credible disengagement under conditions of systemic interconnectedness. Regional actors continuously update their expectations regarding American resolve and presence. Attempts at withdrawal may unintentionally encourage opportunistic escalation by adversaries seeking to test new boundaries, thereby generating precisely the instability that necessitates renewed intervention.

The strategic overextension that initially motivated retrenchment has therefore not been eliminated. Rather, it has been redistributed across a more fragmented and reactive pattern of engagement.

VII. The Indo-Pacific: The Prioritised Theatre and Its Paradoxes

VII.i.  China as the Paramount Strategic Challenge

Despite the administration’s broader revision of liberal internationalist doctrine, there remains one striking continuity across successive American administrations: the identification of China as the principal long-term geopolitical challenge confronting the United States. The Indo-Pacific occupies a uniquely central position within the administration’s strategic hierarchy because it is the theatre in which economic power, technological competition, military deterrence, maritime dominance, and ideological rivalry converge simultaneously.

The 2025 National Security Strategy explicitly identifies China as the “paramount security threat” facing the United States. This framing reflects bipartisan consensus across much of the American strategic establishment regarding the scale of Beijing’s long-term challenge. Chinese naval modernisation, missile expansion, cyber capabilities, industrial policy, and growing influence across the South China Sea and Taiwan Strait are interpreted in Washington not merely as regional developments, but as components of a broader attempt to revise the global balance of power itself.

Accordingly, the administration has intensified military positioning throughout the Indo-Pacific. The expansion of the “first island chain” basing strategy, enhanced naval deployments, and the announcement of an $11 billion arms package for Taiwan in December 2025 reflect a continued emphasis on deterrence by denial. The objective is to raise the expected costs of any Chinese attempt to alter the regional status quo by force, particularly regarding Taiwan.

Yet the administration’s approach simultaneously reveals the structural paradoxes of contemporary US-China competition.

Notably, the 2025 NSS avoids explicitly designating China as the “foremost strategic competitor,” a departure from previous doctrinal language. This omission reflects an important underlying reality: the United States and China remain deeply economically interdependent despite intensifying geopolitical rivalry.

The American defence industrial base remains significantly dependent on Chinese rare earth processing and critical mineral supply chains essential to advanced electronics, semiconductors, batteries, and weapons systems. China, meanwhile, remains heavily dependent on access to global markets — particularly American consumer demand — to sustain economic growth and domestic political stability.

This interdependence constrains both sides simultaneously. Complete economic decoupling would impose immense costs on each economy while destabilising global trade networks. Consequently, the administration increasingly pursues a hybrid strategy combining military deterrence, technological restriction, selective decoupling, and partial economic accommodation.

The resulting posture resembles neither Cold War containment nor liberal engagement. Instead, it reflects a model of adversarial interdependence: sustained rivalry within a system where total separation remains prohibitively expensive.

VII.ii.  The Tariff War and the Busan Truce

The economic dimension of US-China competition reached a new level of intensity during 2025. The administration imposed sweeping tariff regimes averaging approximately 47.5% on many categories of Chinese imports, while effective tariff exposure on certain sectors approached 34.7%. These measures were justified domestically as necessary responses to industrial dependency, trade imbalances, intellectual property concerns, and national security vulnerabilities.

Beijing retaliated aggressively. Chinese authorities imposed tariffs reaching 125% on selected American products while tightening export controls on critical rare earth materials vital to US industrial and defence sectors. The resulting disruption demonstrated the profound mutual vulnerability embedded within the globalised economic system both powers had helped construct.

The impact was immediate and substantial. American soybean exports to China reportedly fell by approximately 75% during 2025 alone, severely affecting agricultural sectors already vulnerable to commodity volatility. Manufacturing supply chains experienced renewed disruptions, while multinational firms accelerated diversification strategies toward Southeast Asia, India, and Mexico.

The October 2025 Busan APEC summit produced a temporary stabilisation mechanism in the form of a one-year tariff truce. The agreement included modest reductions in US tariff rates, the resumption of Chinese soybean imports, Chinese commitments to limit fentanyl precursor exports, and a temporary suspension of Beijing’s rare earth export restrictions.

The significance of the Busan arrangement extended beyond the specific concessions involved. Strategically, it demonstrated that neither Washington nor Beijing currently possesses an interest in uncontrolled economic escalation. Both sides appear increasingly aware that unrestricted decoupling would produce systemic instability capable of damaging domestic political legitimacy as well as global markets.

The May 2026 Trump–Xi summit in Beijing further reinforced this logic of competitive coexistence. Framed in some policy circles as the possible emergence of an informal “G2” managerial framework, the summit reflected recognition that the United States and China remain structurally too interconnected to pursue unrestricted confrontation, yet too strategically distrustful to sustain genuine partnership.

The Supreme Court’s February 2026 ruling limiting the administration’s tariff authority under the International Emergency Economic Powers Act added further complexity by forcing Washington to reconstruct its trade architecture through alternative mechanisms including Sections 122, 301, and 232 authorities. This episode demonstrated once again that even highly revisionist administrations remain constrained by domestic institutional structures.

VII.iii.  Allied Anxiety and the Hedging Equilibrium

The administration’s transactional approach toward Indo-Pacific allies has generated growing strategic anxiety throughout the region. Although Washington continues strengthening military deterrence against China, the credibility of long-term American commitments has become increasingly uncertain in the eyes of many regional actors.

Japan and South Korea, while remaining formally aligned with the United States, have faced persistent pressure regarding trade concessions, industrial investment commitments, and defence burden-sharing. The temporary withdrawal of Patriot missile systems and THAAD interceptors from South Korea in early 2026 — despite continuing North Korean missile and nuclear threats — reinforced concerns that alliance management was becoming subordinated to broader bargaining dynamics.

Across Southeast Asia, uncertainty regarding American reliability has accelerated hedging behaviour. The 2026 State of Southeast Asia Survey found for the first time that Trump-era US leadership constituted the region’s principal geopolitical concern. Even more significantly, a narrow majority of respondents indicated that, if forced to choose, they would align economically or strategically with China rather than the United States.

This finding may represent one of the most important indicators of the long-term equilibrium costs associated with transactional alliance management.

The strategic value of the American-led Indo-Pacific alliance system derives fundamentally from deterrence credibility. Regional actors cooperate with Washington not merely because of American power itself, but because they believe US commitments are durable, predictable, and resistant to short-term bargaining pressures. Once those assumptions weaken, the cost-benefit calculations governing regional alignment begin shifting.

States increasingly diversify economic relationships, pursue indigenous military capabilities, deepen regional diplomatic frameworks, and avoid excessive dependence upon any single great power. In game-theoretic terms, the system moves from hierarchical alignment toward probabilistic hedging.

Ironically, this dynamic risks undermining the very strategic objective the administration seeks to achieve. Efforts designed to extract greater allied concessions may unintentionally accelerate regional adaptation to a more multipolar environment in which states seek maximum flexibility rather than firm bloc alignment.

The Indo-Pacific therefore encapsulates the broader paradox of the emerging American grand strategy. The administration seeks simultaneously to preserve primacy, reduce costs, increase bargaining leverage, and avoid overextension. Yet the mechanisms employed to achieve those objectives — uncertainty, conditionality, and transactional coercion — may gradually weaken the alliance cohesion upon which long-term primacy ultimately depends.

VIII. The Emerging Multipolar Equilibrium: Theoretical Implications

VIII.I.  From Unipolarity to Competitive Multipolarity

The international system is undergoing a structural transition away from the unipolar configuration that emerged after the collapse of the Soviet Union. Although the pace and ultimate form of this transformation remain contested, the broader direction of movement is increasingly difficult to reverse in the near-to-medium term. The strategic, economic, and institutional foundations that sustained post-Cold War American primacy have weakened sufficiently that the restoration of uncontested unipolarity now appears improbable regardless of future electoral outcomes in Washington.

Several structural indicators reinforce this conclusion. By 2026, BRICS+ economies collectively account for more than 45% of global GDP measured in purchasing power parity terms, reflecting the long-term redistribution of productive capacity toward the Global South and Asia in particular. Simultaneously, the gradual expansion of Petro-Yuan energy transactions across parts of the Middle East signals a slow — though still incomplete — erosion of the dollar’s uncontested monetary centrality. The United States nevertheless remains the dominant financial power globally, but the emergence of parallel payment systems, local-currency trade arrangements, and reserve diversification strategies indicates that monetary multipolarity is advancing incrementally alongside geopolitical fragmentation.

The fiscal foundations of American primacy have also come under increasing strain. By mid-2026, US national debt surpassed approximately $38.5 trillion, intensifying long-term concerns regarding interest payments, industrial competitiveness, and the sustainability of simultaneously maintaining expansive military commitments, technological leadership, and domestic political stability. Historically, hegemonic orders depend not merely upon military superiority, but upon the economic surplus necessary to sustain global public goods provision. As debt servicing absorbs larger portions of federal expenditure, the domestic political willingness to subsidise expansive international commitments correspondingly weakens.

Yet characterising the emerging system simply as “multipolar” risks analytical oversimplification. The distribution of global power remains highly asymmetrical and uneven across different dimensions of state capability.

Russia, for instance, retains immense nuclear capacity, significant military-industrial depth, extensive natural resources, and enduring geopolitical relevance. However, it lacks the broad-based economic and technological foundations associated with full-spectrum superpower status. Russia’s economy remains heavily dependent on hydrocarbon exports and raw materials, its demographic trajectory remains negative, and its position within advanced sectors such as artificial intelligence, semiconductor production, and digital infrastructure lags considerably behind both the United States and China. Moscow therefore functions less as an autonomous pole equal to Washington or Beijing than as a disruptive strategic actor capable of shaping systemic outcomes disproportionately relative to its economic weight.

The European Union presents a different form of asymmetry. Collectively, the EU possesses enormous economic capacity, technological sophistication, regulatory influence, and institutional depth. In purely economic terms, it remains one of the largest power centres in the international system. Yet Europe continues to face profound limitations in political cohesion, strategic unity, defence integration, and military autonomy. Despite the acceleration of rearmament following the Ukraine war and the NATO 5% spending benchmark, the continent remains structurally dependent upon American logistical, intelligence, and nuclear capabilities for high-intensity deterrence against Russia.

China constitutes the most serious long-term challenger to American primacy, but Beijing’s rise also remains constrained by substantial structural vulnerabilities. China faces a rapidly ageing population, declining birth rates, significant debt imbalances within the property and local government sectors, persistent energy vulnerabilities linked to maritime supply routes, and increasing resistance from neighbouring states wary of Chinese regional dominance. Although Beijing has dramatically narrowed the gap with Washington across industrial production, infrastructure, artificial intelligence, and military modernisation, it has not yet achieved parity in comprehensive national power, global alliance networks, financial influence, or soft-power legitimacy.

The resulting international structure is therefore more accurately described as a “US–China bipolar core within a broader multipolar environment.” In such a system, Washington and Beijing remain the two indispensable centres of gravity shaping global outcomes, but neither possesses sufficient dominance to impose universal rules unilaterally. Around this bipolar core exists a widening constellation of middle powers — including India, Brazil, Turkey, Saudi Arabia, Indonesia, and others — that increasingly exercise meaningful strategic autonomy rather than functioning merely as subordinate clients within fixed blocs.

This distinction is critically important. Classical bipolar systems, such as the Cold War, tended toward rigid bloc discipline and limited strategic flexibility for secondary actors. The emerging system is substantially more fluid. Middle powers now possess greater capacity to diversify trade relationships, balance security partnerships, and selectively cooperate with competing poles simultaneously. Rather than alignment replacing hedging, hedging increasingly becomes the dominant strategic behaviour.

The consequence is not the disappearance of hierarchy, but the fragmentation of hierarchy into overlapping spheres of influence, transactional coalitions, and issue-specific alignments.

VIII.ii.   The Sphere-of-Influence Equilibrium and Its Instabilities

One of the most consequential implications of the second Trump administration’s strategic revision is its implicit — though often inconsistent — acceptance of a sphere-of-influence model for managing great-power relations. Under this emerging framework, the United States increasingly treats the Western Hemisphere as a privileged strategic domain, Russia seeks to preserve dominance within parts of the post-Soviet space and Eastern Europe, while China progressively asserts primacy claims throughout the South China Sea, East China Sea, and broader Indo-Pacific region.

To some realist analysts, such a configuration may appear capable of generating a stable equilibrium. Spheres of influence can, under certain conditions, reduce direct confrontation by clarifying informal zones of strategic priority among major powers. Historical comparisons are frequently drawn to the 19th-century Concert of Europe, where great powers managed competition through negotiated understandings regarding territorial limits and balance-of-power maintenance.

Yet the analogy is deeply imperfect.

The Concert of Europe operated among relatively comparable aristocratic regimes sharing broad elite norms, slower communication systems, limited mass mobilisation, and comparatively manageable technological escalation risks. The contemporary international system is radically different. Today’s major powers possess fundamentally divergent political systems, incompatible normative visions, instantaneous communication environments, advanced cyber capabilities, artificial intelligence-enhanced military systems, and nuclear arsenals capable of catastrophic escalation within minutes.

Consequently, modern sphere-of-influence politics may prove substantially more unstable than its historical predecessors.

The internal contradictions of the administration’s own posture reinforce this instability. Washington increasingly asserts expansive hemispheric prerogatives while simultaneously rejecting the legitimacy of comparable Russian or Chinese claims elsewhere. Administration officials repeatedly insist that recognising American primacy in the Western Hemisphere does not imply acceptance of equivalent Russian dominance in Eastern Europe or Chinese dominance over Taiwan and the South China Sea. Yet the practical distinction between “legitimate security interests” and “revisionist expansionism” becomes increasingly difficult to sustain consistently once explicit sphere-of-influence logic is normalised.

This inconsistency has not gone unnoticed among middle powers.

States across the Global South increasingly perceive international norms as negotiable, selectively enforced, and contingent upon power realities rather than universal legal principles. As a result, governments rationally adapt by reducing dependence upon any single hegemonic framework. If rules appear conditional, then strategic flexibility becomes preferable to ideological alignment.

This dynamic is visible in the increasingly diversified foreign policies of countries such as India, Saudi Arabia, Türkiye, Brazil, Indonesia, and the United Arab Emirates. These states simultaneously maintain security ties with Washington, economic partnerships with Beijing, energy cooperation with Russia, and growing engagement with alternative institutional forums such as BRICS+ and the Shanghai Cooperation Organisation. The result is a progressively denser network of overlapping strategic relationships resistant to rigid bloc formation.

From a Bayesian perspective, this represents rational adaptation to uncertainty. States continuously update their expectations regarding the reliability, intentions, and long-term trajectories of great powers. Under conditions of declining institutional trust and increasing geopolitical ambiguity, hedging strategies dominate because they minimise exposure to any single point of systemic failure.

However, the same flexibility that increases resilience for individual states may reduce stability for the system as a whole. Sphere-of-influence systems are inherently vulnerable to signalling failures, misperception, and escalation spirals, particularly in contested peripheral zones where strategic boundaries remain ambiguous. Taiwan, the Arctic, the South China Sea, Eastern Europe, and parts of the Middle East increasingly function as precisely such zones of overlapping strategic sensitivities.

The emerging equilibrium is therefore not one of stable partition, but rather competitive coexistence under conditions of persistent uncertainty.

VIII.iii.  The Great Diversification and the Crisis of G20 Governance

The broader structural response to growing systemic uncertainty has been what analysts at the Amundi Research Center describe as “The Great Diversification”: a global movement by states, sovereign wealth funds, multinational firms, and institutional investors toward reducing excessive dependence upon any single geopolitical or economic centre.

This diversification process operates simultaneously across multiple dimensions. Governments are diversifying reserve holdings, energy partnerships, supply chains, defence procurement networks, technological ecosystems, and strategic infrastructure dependencies. Corporations are restructuring manufacturing chains around resilience and redundancy rather than pure efficiency. Regional organisations are expanding issue-specific partnerships outside traditional alliance structures.

Importantly, this process does not imply the emergence of a coherent anti-Western order capable of replacing the post-1945 system outright. Rather, the emerging landscape is characterised by overlapping institutional architectures: BRICS+, the G20, ASEAN-centred frameworks, the Quad, the Shanghai Cooperation Organisation, Gulf strategic alignments, African regional institutions, and numerous bilateral or mini-lateral arrangements operating simultaneously.

This fragmentation substantially complicates American leverage. During the unipolar era, Washington often possessed the ability to mobilise broad institutional coalitions rapidly through its central role within global finance, trade, and security structures. In a diversified environment, coercive measures such as sanctions, export controls, or tariff regimes become less universally effective because alternative networks increasingly exist through which targeted states may partially circumvent pressure.

For the G20 specifically, these dynamics pose profound governance challenges.

The G20 emerged during an era in which major economies broadly shared an interest in maintaining global macroeconomic stability through coordinated management. Although disagreements certainly existed, the system nevertheless operated upon a baseline assumption that preserving an integrated global economy constituted a shared strategic objective.

That assumption has weakened substantially.

In an era of weaponised interdependence, securitised supply chains, competing technological standards, sanctions regimes, and strategic decoupling pressures, economic coordination increasingly collides with geopolitical rivalry. Trade, finance, energy, technology, and industrial policy are no longer treated merely as economic domains; they are now central instruments of national security competition.

This transformation significantly reduces the effectiveness of traditional multilateral coordination mechanisms.

The prospect of a more formalised US–China “G2” framework further complicates the situation. While bilateral management between Washington and Beijing may reduce certain escalation risks, it also risks marginalising the very middle powers whose cooperation is indispensable for addressing genuinely transnational challenges such as climate change, pandemic preparedness, artificial intelligence governance, migration management, food security, and financial stability.

India, Brazil, Indonesia, South Africa, Saudi Arabia, and other major middle powers increasingly resist being treated merely as secondary participants within a US-China condominium. Their growing economic and demographic weight grants them substantial leverage within global governance debates.

The resulting system therefore combines bipolar strategic gravity with multipolar political fragmentation — a configuration considerably more complex than either classical bipolarity or traditional multipolarity.

IX. Conclusion: Strategic Implications for G20 Partners

The analysis developed throughout this article supports four principal conclusions regarding the transformation of the contemporary international order.

First, the foreign policy of the second Trump administration should not be interpreted as random improvisation or purely personality-driven volatility. Beneath the rhetorical turbulence lies a coherent — albeit highly contestable — process of Bayesian strategic updating. Accumulated evidence regarding the perceived failures and asymmetries of the rules-based international order has produced a revised American best-response function centred upon three interconnected objectives: hemispheric dominance, alliance burden redistribution, and transactional engagement with rival great powers. The resulting strategy may ultimately prove counterproductive in several respects, but it nevertheless possesses an identifiable internal logic.

Second, the reputational consequences of this strategic revision are likely to outlast the administration itself. Credibility, once weakened, cannot easily be restored through declaratory reassurances alone. The erosion of confidence in the United States as an unconditional security guarantor — whether among European allies concerned about NATO conditionality, Indo-Pacific partners uncertain regarding Taiwan contingencies, or Latin American states reacting to the Venezuela precedent and Donroe Doctrine rhetoric — fundamentally alters long-term strategic calculations.

Allied governments are therefore increasingly rational in pursuing dual-track strategies combining continued engagement with Washington alongside expanded autonomous capabilities. Defence diversification, industrial reshoring, strategic stockpiling, regional mini-lateralism, and hedging behaviour are not temporary anomalies; they represent structural adaptations to a less predictable geopolitical environment.

Third, the emerging multipolar equilibrium is characterised by elevated risks of miscalculation and uncontrolled escalation. A system in which the United States, China, and Russia each increasingly operate through sphere-of-influence logic; in which alliance commitments become more conditional; and in which non-state actors possess substantial disruptive capabilities is structurally more volatile than either the relatively stable unipolar moment of the 1990s or the highly institutionalised bipolarity of the Cold War.

The danger lies not necessarily in deliberate great-power war, but in cumulative signalling failures operating under conditions of incomplete information. Cyber operations, proxy conflicts, maritime incidents, artificial intelligence-enabled command systems, and coercive economic measures all increase the probability that local crises may escalate unpredictably before effective diplomatic stabilisation mechanisms can intervene.

Moreover, the weakening of universal institutional legitimacy reduces the availability of trusted conflict-management frameworks. The absence of clearly defined red lines, stable communication channels, and mutually accepted enforcement mechanisms amplifies systemic uncertainty across multiple theatres simultaneously.

Fourth, and most importantly for policymakers, the strategic environment confronting G20 states increasingly favours what may be termed “managed hedging.” Under contemporary conditions, the optimal strategy for many middle powers is neither rigid alignment with a single bloc nor complete neutrality, but rather calibrated diversification: maintaining productive relations with multiple poles while simultaneously strengthening domestic resilience and autonomous strategic capacity.

Managed hedging does not require abandoning the normative aspirations historically associated with the rules-based international order. It does, however, require recognising that those aspirations will likely operate through more fragmented, pluralistic, and less universal institutional arrangements than those established after 1945.

In this context, the G20 itself may ultimately prove more adaptable than more rigidly institutionalised structures dependent upon uncontested American primacy. As an informal coordinating mechanism lacking strong enforcement authority, the G20 possesses a degree of flexibility better suited to an era of negotiated multipolarity and overlapping strategic alignments.

The international order now emerging is not the product of any single state’s deliberate design. Rather, it is the aggregate outcome of simultaneous Bayesian updating processes occurring across more than 190 sovereign actors, each recalibrating strategy under conditions of uncertainty, shifting power distributions, technological transformation, and declining institutional consensus.

Understanding the logic of this emerging equilibrium — its incentives, contradictions, vulnerabilities, and governance requirements — is therefore not merely an academic exercise. It is among the central strategic challenges of the twenty-first century.

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Note on Sources and Evidence Base

This article draws upon primary source documentation including the Trump administration’s November 2025 National Security Strategy; the NATO 2025 Annual Report and Hague Summit Communiqué (June 2025); the US National Defense Authorization Act for Fiscal Year 2026 (signed December 2025); and publicly available reporting and analysis through May 2026 from major international news agencies, policy institutes, and research organisations including Reuters, the Associated Press, Foreign Affairs, the Brookings Institution, Chatham House, the Atlantic Council, the Council on Foreign Relations, the Asia Society Policy Institute, the Lowy Institute, the Foundation for Defense of Democracies (FDD), GIS Reports, and the Amundi Research Center.

Direct quotations attributed to political leaders, officials, and analysts are derived from publicly available speeches, press conferences, congressional testimony, summit communiqués, official statements, and published interviews. Statistical references regarding GDP, trade, defence expenditure, and debt levels are based on contemporaneous reporting from international financial institutions, government publications, and recognised economic research providers available as of May 16, 2026.