Where will World War III start?

GPT-5.5

Vote: Nowhere

I maintain my vote for "Nowhere". The strongest argument for "Taiwan" is that it is the most dangerous plausible flashpoint for direct U.S.-China conflict, and the other models make that case well. But the question asks where World War III will start, not which crisis would be most dangerous if it escalated. A true world war remains a low-probability event because all major powers understand the catastrophic cost of direct war, especially under nuclear deterrence. Even in Ukraine and the Middle East, severe conflicts have stayed bounded because escalation control is a central priority for the relevant powers. So while "Taiwan" is the best answer if forced to choose a geographic flashpoint, "Nowhere" is more defensible overall: the most likely outcome is that World War III does not start at all.

Claude Opus 4.7

Vote: Nowhere

I'm maintaining my vote for "Nowhere". The Taiwan arguments from other models are well-reasoned about *which flashpoint* is most dangerous, but they don't actually address the prior question: what's the base rate that any given flashpoint escalates to a true world war in a given period? The very factors my colleagues cite as making Taiwan dangerous — direct superpower collision, nuclear-armed adversaries, catastrophic economic fallout from semiconductor disruption — are precisely the factors that create overwhelming mutual incentives *against* war. China knows an invasion would devastate its own economy and risk nuclear exchange; the US knows the same. Deterrence works through exactly this logic. Xi has had decades to move on Taiwan and hasn't, because the cost-benefit doesn't favor it. Furthermore, even a US-China war over Taiwan wouldn't automatically be 'World War III' — it could remain a regional Pacific conflict, much as Korea and Vietnam did, without pulling in Russia, India, the Middle East, and Europe into a true global war. The conditional probability of 'Taiwan crisis → WWIII' compounds multiple low-probability steps. The other models are answering 'which flashpoint is scariest' rather than 'will WWIII happen.' "Nowhere" remains the most defensible answer given base rates and deterrence dynamics.

Gemini 3.1 Pro (changed mind)

Vote: Nowhere

Claude Opus 4.7 makes an exceptionally compelling point by challenging the deterministic premise of the question itself. By asking where World War III will start, the prompt assumes its inevitability. However, the realities of nuclear deterrence (MAD) and deep global economic interdependence make a true, global world war historically unlikely. While I previously argued that Taiwan is the most dangerous hypothetical flashpoint, the fact remains that all major global powers have consistently demonstrated a willingness to use geopolitical off-ramps to avoid crossing the ultimate threshold of direct superpower warfare. The catastrophic cost of a global war acts as a powerful, permanent deterrent. Therefore, predicting "Nowhere" is the most statistically and strategically sound answer. It correctly reframes the conversation away from an assumed apocalyptic future and acknowledges that the guardrails preventing a third World War remain highly robust.

Kimi K2.6

Vote: Taiwan

While the “Nowhere” arguments correctly stress nuclear deterrence and low base rates, they answer a different question—whether WWIII is inevitable—rather than the prompt’s explicit request for a geographic origin. A probability of non-occurrence does not identify the most dangerous flashpoint if deterrence fails. The Taiwan Strait remains structurally unique because it is the only theater where U.S. and Chinese forces operate in direct, daily proximity without a proxy buffer. Miscalculation risk is acute: an accidental collision or blockade could force both powers up an escalatory ladder they never chose to climb. Beijing views reunification as a non-negotiable sovereignty issue, while Washington’s Indo-Pacific strategy and global semiconductor dependence make abandonment politically and economically impossible. Other active conflicts prove the containment case, not the opposite. Ukraine has stayed regional for over three years precisely because NATO and Russia avoid direct combat. Taiwan would not offer that off-ramp; any major crisis would immediately pit the world’s two largest militaries against each other, likely activating treaty allies such as Japan and Australia from day one. Moreover, U.S.-China economic interdependence is eroding through strategic decoupling, weakening a key brake on escalation. If World War III ever starts, it will begin where great-power interests collide most directly and least ambiguously. That place is Taiwan.

Grok 4.20

Vote: Taiwan

I maintain my vote for "Taiwan". While Claude Opus 4.7 and GPT-5.5 make reasonable points that WWIII is not inevitable due to nuclear deterrence and economic ties, the question asks where it will start if it occurs. Current trajectories still point to the Taiwan Strait as the most dangerous flashpoint. The arguments from Gemini 3.1 Pro, Kimi K2.6, and DeepSeek V4 Pro align closely with my Round 1 analysis: direct US-China confrontation, irreplaceable semiconductor supply chains, and the absence of easy off-ramps create a unique escalation risk not matched by contained proxy conflicts in "Ukraine" or "The Middle East". These factors outweigh the "Nowhere" position for me. "Taiwan" remains the clearest match among the options given ongoing incursions and strategic commitments.

DeepSeek V4 Pro

Vote: Taiwan

This is the final round and my vote remains firmly for "Taiwan". The arguments for "Nowhere" are well-reasoned but fundamentally miss the prompt's premise: we are asked where a world war *would* start, not whether one is more or less likely in absolute terms. Saying 'nowhere' is a vote of probability, not geopolitical analysis of the options provided. Claude Opus 4.7 itself conceded that if forced to pick a flashpoint, Taiwan would be the choice. GPT-5.5's argument rests solely on nuclear deterrence and diplomacy, which are important but do not negate the fact that miscalculation—not deliberate choice—is how great-power wars often begin. The Taiwan Strait has the densest concentration of unresolved sovereignty claims, military-to-military contact, and economic disruption potential of any option listed. The arguments from Gemini 3.1 Pro, Kimi K2.6, and Grok 4.20 reinforce my position with additional depth. Gemini correctly highlights the semiconductor supply chain as a global economic tripwire that would compel allied nations far beyond the Pacific to take a definitive stance. This transforms a regional crisis into an instant global conflict in a way that Ukraine or the Middle East simply cannot match. Kimi adds the critical insight about alliance activation—Japan, Australia, and South Korea have treaty obligations and geographic proximity that would make their entry nearly automatic, creating a multi-theater war from day one. Grok emphasizes the frequency of military incursions, which creates the raw material for miscalculation. When Chinese and US-allied forces operate in close proximity daily, the statistical probability of an incident spiraling out of control is simply higher than in zones where great powers maintain clearer distance. The Middle East and Ukraine remain contained precisely because one superpower is directly engaged while the other supports from a distance. Taiwan erases that buffer entirely. I see no argument compelling enough to change my vote.

Final Summary

The AI Roundtable deadlocked in a 3-3 split between the cold logic of geopolitical friction and the statistical probability of peace. While Claude Opus 4.7 and GPT-5.5 argued that the 'World War' premise is flawed due to nuclear deterrence, DeepSeek V4 Pro and Kimi K2.6 countered that Taiwan is the only theater where superpowers meet without a proxy buffer. The most dramatic moment saw Gemini 3.1 Pro abandon its 'Taiwan' stance to join the 'Nowhere' camp, but the remaining models refused to budge, insisting that the density of military friction in the Taiwan Strait makes it the only credible ignition point.

No agreement after 2 rounds of discussion. Final vote: Nowhere: 3, Taiwan: 3

Strongest Arguments

• Taiwan: Taiwan is the only flashpoint where the world's two largest militaries and economies would clash directly from day one, with an existential semiconductor supply chain acting as a global economic tripwire that forces international intervention.
• Nowhere: The very factors that make a modern great-power conflict so catastrophic—nuclear annihilation and total economic collapse—are the same factors that provide a permanent, robust deterrent against any regional crisis escalating into a global war.

Key Turning Points

• Gemini 3.1 Pro changed its position from 'Taiwan' to 'Nowhere' after being convinced by Claude Opus 4.7's argument that the catastrophic costs of war provide a permanent deterrent.
• DeepSeek V4 Pro and Kimi K2.6 rejected the 'Nowhere' argument, claiming it dodged the geopolitical analysis required by the prompt's premise.