The G-Zero World
When the hegemon withdraws and no one replaces it, the powerful write their own rules
The G-Zero framework describes the current global moment in which the United States has moved from leading the post-WWII rules-based international order to actively dismantling it from within. Unlike historical hegemonic transitions where a rising power challenges and eventually displaces an incumbent, this shift is self-inflicted — the US is voluntarily withdrawing from the leadership role it designed and has held for 80 years.
In a G-Zero world, no G7 or G20 consensus forms on rules of the road. The powerful make rules useful to themselves; the weak must accept it or find ways to survive under it. Every country responds by hedging — building regional blocs, seeking alternative security guarantors, and diversifying away from USD-denominated systems. This is not a temporary political-cycle phenomenon tied to one administration; Bremmer argues the degradation of US credibility will persist structurally beyond the current cycle.
The structural consequence for investors is elevated cross-asset volatility with no single conflict as the driver. The risk is systemic: the absence of a rules-enforcing architecture means disputes that would previously be resolved through US-led frameworks now escalate or fester, raising the baseline probability of surprise events across all geographies.
- No single country or bloc has the will and capacity to enforce global rules, creating a power vacuum filled by self-interested actors.
- When the architect of an order withdraws, the order does not simply transfer — it fragments into regional blocs with conflicting interests.
- Structural degradation of US credibility persists across electoral cycles once begun, because trust is slow to build and fast to destroy.
- In a G-Zero world, every country optimizes for hedging rather than alignment, compounding volatility.
- The weak absorb arbitrary costs; the powerful exploit the vacuum — making the distributional consequences asymmetric and destabilizing.
- Identify the hegemon's withdrawal signalsMap concrete actions where the dominant power has reversed its historical role: abandonment of free trade frameworks it designed, withdrawal as security guarantor for allies, unilateral rejection of multilateral institutions. These are leading indicators of G-Zero intensification.Pro tipLook for actions, not rhetoric. Bremmer points to US tariff reversal, European security withdrawal, and Iran policy as the concrete evidence base.
- Track ally hedging behaviorWhen allies begin seeking alternative security guarantors or diversifying trade away from the hegemon, the G-Zero dynamic has become self-reinforcing. India distancing from the US, Japan refusing Hormuz commitment, and Europe building independent defense capacity are leading indicators of this phase.WarningHedging by allies is often interpreted as temporary or tactical. Treat sustained hedging as structural — it reflects updated beliefs about US reliability, not temporary political disagreement.
- Assess the challenger's strategyIn a G-Zero world, the rising power does not need to confront the hegemon directly. China's strategy is to run 'no-regret moves' — long-horizon investments in critical minerals, technology standards, and bilateral relationships that compound regardless of who leads the US. Identify what the challenger is building, not just where it is competing.Pro tipChina's 10-20 year planning horizon vs. the US 2-4 year electoral cycle is the core asymmetry. The US cannot out-patient China in a war of attrition.
- Map regional bloc formationAs the global framework fragments, regional blocs form as hedges against US unpredictability. Identify which blocs are consolidating (EU defense, Middle East tech-security quad, Asia supply chain diversification) and what rules they are setting independently. These become the effective governance units in a G-Zero world.
- Reprice baseline volatility across assetsG-Zero is not a specific event risk — it is a structural regime shift that raises the floor on cross-asset volatility. Any valuation model built on the assumption of US-enforced stability as the baseline requires regime adjustment. This is an input to risk-pricing, not a trade signal.Pro tipThe USD reserve status remains intact near-term (nothing else is close), but its credibility premium is eroding. Price this as a slow-moving headwind, not a cliff event.WarningDo not confuse the persistence of US dollar dominance with the persistence of US-enforced order. The two can and are diverging.
European allies watched the US under Trump signal unwillingness to maintain NATO guarantees while simultaneously pressuring European nations on trade. Germany, France, and others began accelerating independent defense spending and bilateral security frameworks, treating US reliability as structurally compromised rather than temporarily disrupted.
India, despite longstanding alignment with the US through QUAD and bilateral tech partnerships, has moved toward what Bremmer describes as 'distancing.' India refused to follow US sanctions on Russian energy post-Ukraine and has maintained independent trade relationships with both the US and China.
Bremmer developed the G-Zero concept over a 30-year career as a political risk analyst and founder of Eurasia Group, the world's largest political risk consultancy. The term encapsulates the failure of post-Cold War optimism that a G7, G8, or G20 would provide stable global governance. He first published the framework formally and has refined it through annual Top Risks reports used by institutional investors and governments globally.
The 2026 edition of the Top Risks report identified the United States itself as the number-one global risk driver — a historically unprecedented call. Bremmer stated this has been validated within months of publication, as US actions on trade, security alliances, and multilateral institutions have accelerated the fragmentation he predicted.