History tells us that when a rising power threatens to displace a ruling one, war follows 75% of the time. The US-China rivalry is the most consequential power transition in modern history. Understanding the structural forces at play is the first step toward preventing catastrophe.
The question of whether the United States and China will go to war is not one of personalities, tweets, or election cycles. It is a structural question — rooted in the same iron logic that has governed great-power relations for 2,500 years. When the ancient Greek historian Thucydides wrote that "it was the rise of Athens and the fear that this instilled in Sparta that made war inevitable," he identified a pattern that has repeated across every century since.
Harvard political scientist Graham Allison formalized this insight as the Thucydides Trap: the dangerous dynamic that occurs when a rapidly rising power threatens to displace a ruling one. His research at the Belfer Center for Science and International Affairs identified 16 historical cases of such transitions over 500 years. In 12 of them — 75% — the result was war. The structural pressures of fear, honor, and interest that Thucydides identified in the 5th century BCE operate with the same force in the 21st century.
No bilateral relationship on Earth more clearly embodies these dynamics than the rivalry between the United States and China. Consider the trajectory: in 1980, China's GDP was roughly one-tenth the size of America's. By 2014, China surpassed the United States in purchasing power parity. Today, China is the world's largest trading nation, the largest manufacturer, and the second-largest economy by nominal GDP — representing the fastest major-power economic rise in recorded history.
"On the current trajectory, the US and China are headed for the worst collision in history. This is not a prediction of inevitability. It is a warning that demands statecraft the likes of which we have never seen."
This rise is occurring in a world where the United States has built its entire foreign policy, military posture, and alliance architecture around maintaining American primacy. The U.S. operates over 750 military bases in at least 80 countries, maintains the world's most powerful navy, and has structured the global financial system around the dollar. China's ascent challenges every pillar of this order — not through ideology alone, but through the sheer gravitational pull of its economic mass.
The structural forces at work are not abstract. They manifest in concrete competition: the semiconductor export controls, the military exercises around Taiwan, the artificial island construction in the South China Sea, the trade wars and tariff escalations, the technology bans, the diplomatic ruptures. Each crisis is a symptom of a deeper structural condition — two great powers locked in a competition where one's gain is perceived as the other's loss.
What makes this rivalry especially dangerous is that it operates on multiple dimensions simultaneously. Unlike the Cold War, where the US and Soviet Union competed primarily in military and ideological spheres, the US-China competition encompasses economics, technology, military power, ideology, and institutional influence. There is no domain of global affairs untouched by this rivalry, and no easy way to compartmentalize the competition to prevent escalation in one sphere from spilling into others.
While the structural forces of the Thucydides Trap create the conditions for conflict, wars are not started by abstractions. They are started by specific crises that escalate beyond control. The US-China relationship features at least five flashpoints, each of which carries the potential for rapid, uncontrolled escalation into military confrontation.
If there is one issue that could plausibly trigger a US-China war within the next decade, it is Taiwan. The island sits at the intersection of every structural tension in the relationship. For Beijing, Taiwan is not a foreign policy issue — it is an unresolved civil war, a question of territorial integrity woven into the legitimacy of the Chinese Communist Party. Xi Jinping has called reunification a "historical inevitability" and has refused to rule out the use of force.
For Washington, Taiwan represents the credibility of the entire American alliance system in Asia. If the United States failed to defend Taiwan, allies such as Japan, South Korea, the Philippines, and Australia would question whether American security guarantees mean anything. The dominoes of the Indo-Pacific alliance architecture would begin to fall.
The danger is compounded by the fact that Taiwan produces the vast majority of the world's most advanced semiconductors through TSMC. Control of Taiwan would give Beijing leverage over the global technology supply chain that no other nation possesses. This economic dimension makes Taiwan not just a sovereignty question but a strategic prize of the highest order.
Military planners on both sides have been gaming a Taiwan conflict for years. The People's Liberation Army has dramatically expanded its amphibious assault capability, conducted increasingly aggressive air incursions into Taiwan's air defense identification zone, and rehearsed blockade operations. The US has responded by pre-positioning munitions, deepening military cooperation with Japan and Australia, and developing new operational concepts for distributed maritime warfare in the Western Pacific.
"Taiwan is the place where the Thucydides Trap could snap shut. It combines territorial sovereignty, alliance credibility, and technological supremacy into a single, indivisible crisis."
Of the 16 historical power transitions Allison studied, none involved two adversaries with thermonuclear arsenals capable of ending civilization. This single factor fundamentally distinguishes the US-China rivalry from every previous case in the Thucydides Trap framework — and it is the strongest argument that history may not repeat itself.
The logic of nuclear deterrence is brutally simple: if both sides possess the ability to inflict unacceptable destruction on the other, even after absorbing a first strike, then rational leaders will always prefer any outcome to nuclear war. This principle of mutually assured destruction (MAD) kept the peace between the United States and the Soviet Union for over four decades, despite ideological hostility, proxy wars, and repeated crises that pushed the world to the brink.
The United States maintains approximately 5,500 nuclear warheads. China's arsenal, historically modest by comparison, is undergoing rapid expansion — with the Pentagon estimating China will possess over 1,000 operational warheads by 2030 and potentially 1,500 by 2035. This expansion is significant because it moves China from a minimal deterrent posture toward something closer to strategic parity, ensuring that any US nuclear threat against China would be met with devastating retaliation.
However, nuclear deterrence is not an automatic safeguard against all conflict. It prevents only the most extreme escalation — it does not prevent conventional wars, naval skirmishes, economic warfare, or proxy conflicts. The Korean War, the Vietnam War, and multiple India-Pakistan clashes all occurred between nuclear-armed states or their allies. The question is not whether the US and China would exchange nuclear strikes — almost certainly they would not. The question is whether the existence of nuclear weapons prevents the kind of limited conventional conflict that could still kill hundreds of thousands, devastate the global economy, and reshape the international order.
There is also the problem of escalation control. In a conventional conflict over Taiwan, for example, both sides would face enormous pressure to escalate. If China were losing a conventional naval battle, would it consider using a tactical nuclear weapon against a US carrier strike group? If the US were striking targets on the Chinese mainland, would Beijing interpret this as a prelude to a decapitation strike and launch a nuclear response? The fog of war, compressed decision timelines, and the vulnerability of command-and-control systems all make escalation management far more difficult than deterrence theory suggests.
Furthermore, new technologies — hypersonic missiles, anti-satellite weapons, cyber attacks on nuclear command systems — are eroding the stable deterrence framework that kept the Cold War cold. If one side believes its second-strike capability is threatened, the incentive for pre-emptive action increases dramatically. This "use it or lose it" pressure is precisely the kind of structural force that the Thucydides Trap warns about.
"Nuclear weapons make total war unthinkable. They do not make limited war impossible. The danger is that limited war, once begun, may not remain limited."
One of the most frequently cited arguments against a US-China war is the extraordinary depth of economic interdependence between the two nations. Total bilateral trade has exceeded $700 billion annually in recent years. China holds over $800 billion in US Treasury securities. American corporations have invested hundreds of billions in Chinese operations. The supply chains that produce everything from iPhones to pharmaceuticals span both countries.
The theory is straightforward: when two economies are so deeply intertwined, the cost of war becomes so catastrophic that rational leaders will always find an alternative. A US-China military conflict would trigger the largest economic disruption in human history — potentially collapsing global trade, crashing financial markets, severing supply chains, and plunging both nations into deep recession.
This argument has genuine force. Economic interdependence does raise the cost of conflict and does create powerful domestic constituencies opposed to war. Business leaders, financial institutions, and export-dependent industries in both countries have strong incentives to lobby for peaceful resolution of disputes.
But history offers a devastating counter-example. In 1914, the European great powers were more economically interdependent than at any previous point in history. Britain and Germany were each other's largest trading partners. French banks had invested billions in Russian bonds. The prevailing wisdom — articulated most famously by Norman Angell in his 1910 book The Great Illusion — was that war between industrial economies had become economically irrational and therefore impossible.
It was not impossible. It happened. And it happened not because leaders did not understand the economic costs, but because structural pressures, alliance commitments, nationalist sentiment, and miscalculation overwhelmed economic rationality. The lesson of 1914 is not that economic interdependence is irrelevant — it is that economic interdependence alone is insufficient to prevent war when structural forces reach a critical threshold.
Moreover, the current trajectory of US-China economic relations is moving in the wrong direction. The trend since 2018 has been toward decoupling, not deepening integration. Tariff wars, technology export controls, investment screening, entity lists, and supply-chain diversification initiatives are systematically weakening the economic ties that might otherwise serve as a brake on conflict. If this trend continues, the economic cost of war will decrease year by year — removing one of the strongest structural barriers to conflict precisely when it is most needed.
There is also the darker possibility that economic interdependence itself becomes a weapon rather than a constraint. China's dominance in rare earth minerals, its control over critical supply chains, and its ability to weaponize market access give Beijing coercive tools short of war. The United States' control of the dollar-based financial system, its ability to impose sanctions, and its leverage over global technology standards give Washington equivalent tools. When economic interdependence is weaponized, it ceases to be a stabilizing force and becomes another arena of confrontation.
The question "will the US and China go to war?" elicits a range of responses from the world's leading strategists, historians, and policy makers. No credible expert treats the question as trivial, and no serious analyst dismisses the possibility entirely. The debate centers not on whether conflict is conceivable, but on how likely it is and what form it might take.
Graham Allison, the architect of the Thucydides Trap framework, has warned that on current trajectories, the US and China are headed for a collision. His historical analysis suggests that the structural conditions — a rising power challenging a ruling one across every dimension of national power — are as dangerous as any in the 500-year record. Allison does not predict war as inevitable, but he insists that avoiding it requires a level of statecraft "beyond anything previously demonstrated."
John Mearsheimer, the University of Chicago's leading offensive realist, is more blunt. He argues that China's rise makes intense security competition inevitable and that the US will attempt to contain China much as it contained the Soviet Union. Mearsheimer believes the risk of war is substantial and growing, driven by the geographic reality of Taiwan and the security dilemma in the Western Pacific.
Elbridge Colby, former Deputy Assistant Secretary of Defense, has argued that the US must prepare for a war with China over Taiwan and that deterrence requires demonstrating both the capability and the willingness to fight. His position represents a growing school within US defense policy that treats conflict with China as the central planning scenario.
Joseph Nye, the Harvard political scientist who coined the term "soft power," argues that the Thucydides Trap analogy is imperfect because nuclear weapons, economic interdependence, and international institutions have fundamentally changed the calculus of great-power relations. Nye believes that war is avoidable if both sides manage their competition wisely, though he acknowledges the risk is real and rising.
Kevin Rudd, former Prime Minister of Australia and a Mandarin-speaking China scholar, advocates for what he calls "managed strategic competition" — a framework where both sides acknowledge their rivalry but establish guardrails to prevent escalation. Rudd is neither optimistic nor pessimistic; he argues that the outcome depends entirely on the quality of leadership on both sides.
Kishore Mahbubani, the Singaporean diplomat and scholar, argues that China's rise does not necessarily threaten the US in the way Athens threatened Sparta, because China's strategic culture is historically more defensive and status-quo oriented than Western analysts assume. He contends that the real danger lies in American overreaction to China's legitimate development, not in Chinese aggression.
"The consensus among serious strategists is not that war is inevitable, but that it is more likely than at any point since the end of the Cold War — and that the window for prevention is narrowing."
US intelligence assessments have consistently identified China as the "pacing threat" and the most consequential geopolitical challenge of the 21st century. The annual threat assessments from the Director of National Intelligence highlight Taiwan, the South China Sea, and technology competition as the primary vectors for potential conflict. The Pentagon's annual reports on Chinese military power have tracked an accelerating modernization program explicitly designed to deter and, if necessary, defeat US intervention in a regional conflict.
The intelligence community does not assign a specific probability to US-China war, but the trend lines in their assessments are unmistakable: the risk is growing, the military balance in the Western Pacific is shifting, and the decision window for maintaining deterrence without provoking escalation is tightening.
Understanding how a war might start is essential for understanding how to prevent one. Wars between great powers rarely begin with a rational, deliberate decision to fight. They begin with miscalculation, escalation, and the failure of off-ramps. Here are the scenarios that military planners, strategists, and historians consider most plausible.
The most widely discussed scenario involves Taiwan. A Chinese blockade or invasion of Taiwan would force the United States to choose between military intervention — risking direct war with a nuclear power — and abandonment, which would shatter American credibility across the Indo-Pacific. Most analysts believe a Chinese military move against Taiwan would trigger US intervention, though the form and scale of that intervention is debated.
The crisis could begin with a provocation short of invasion: a blockade of Taiwan's ports, a no-fly zone over the Taiwan Strait, or a seizure of Taiwan's outlying islands. Each step would force escalatory decisions on both sides, with compressed timelines and incomplete information — precisely the conditions under which catastrophic miscalculation occurs.
A collision between US and Chinese naval vessels, a shooting down of a reconnaissance aircraft, or a confrontation over disputed territory in the South China Sea could escalate rapidly. The 2001 EP-3 incident — in which a Chinese fighter jet collided with a US surveillance aircraft — demonstrated how quickly routine operations can produce crises. In a more militarized environment, a similar incident could escalate before diplomatic channels can defuse it.
Some of history's greatest wars were triggered by actions of third parties. World War I began with the assassination of an Austrian archduke by a Serbian nationalist — but the structural conditions made it a global catastrophe. In the US-China context, a North Korean provocation, a military conflict between India and China, or a crisis involving the Philippines or Japan could draw both superpowers into a confrontation neither sought.
A cyber attack on critical infrastructure — power grids, financial systems, military command networks — could be interpreted as an act of war, even if intended as a signal or a limited coercive action. The difficulty of attributing cyber attacks in real time, combined with the pressure to respond decisively, creates a uniquely modern pathway to escalation. If a cyber attack disabled early-warning systems or nuclear command infrastructure, the targeted side might assume a first strike was imminent and respond accordingly.
An escalating economic conflict — comprehensive sanctions, seizure of assets, blockade of shipping lanes — could cross the threshold into military action. If the United States froze all Chinese assets in the dollar system, or if China imposed a resource embargo on critical minerals, the targeted country might conclude that economic warfare had already become an act of aggression requiring a military response. The line between economic coercion and acts of war is far less clear than most people assume.
The Thucydides Trap is not a death sentence. In 4 of 16 historical cases, the rising and ruling powers managed the transition without large-scale conflict. The question is whether the United States and China can learn from those precedents and apply their lessons under immeasurably more complex conditions.
The most dangerous period in any great-power rivalry is when communication breaks down. During the Cuban Missile Crisis, direct communication between Kennedy and Khrushchev proved essential to de-escalation. Military-to-military hotlines, regular summit diplomacy, and crisis communication protocols are not signs of weakness — they are critical infrastructure for preventing accidental war. The periods when US-China military communication has been suspended have been among the most dangerous moments in the relationship.
Ambiguity is dangerous. Both sides need to understand precisely what actions would trigger a military response. The US policy of strategic ambiguity on Taiwan has served its purpose for decades, but as military capabilities and political pressures change, ambiguity can become a source of miscalculation rather than stability. Clear, credible commitments — both of what each side will defend and what it will accept — are essential for deterrence without provocation.
Complete economic decoupling removes one of the strongest structural barriers to conflict. While security-related supply chains may need to be diversified, maintaining broad economic engagement raises the cost of war for both sides and sustains domestic constituencies with interests in peace. The goal should be "de-risking" rather than decoupling — reducing vulnerability without eliminating the economic integration that makes war catastrophically expensive.
The most successful case of peaceful power transition in history — Britain's accommodation of the rising United States in the late 19th century — required the incumbent power to make genuine strategic concessions. Britain withdrew from the Western Hemisphere, accepted American regional primacy, and invested in a shared institutional framework rather than fighting to preserve absolute dominance. The United States need not cede its interests, but it must recognize that a China with the world's largest economy will inevitably play a larger role in global governance, and that refusing to accommodate any Chinese aspirations guarantees confrontation.
International institutions — from the United Nations to the WTO to regional security forums — provide frameworks for managing competition without resorting to force. When these institutions are weakened or bypassed, the structural forces driving great-power conflict operate without constraint. Both the US and China have interests in a rules-based international order, even if they disagree about what those rules should be. The negotiation of rules is itself a form of managed competition.
Credible military deterrence remains essential. The lesson of history is that weakness invites aggression. But deterrence must be calibrated to avoid provoking the very conflict it seeks to prevent. An arms race that leaves one side fearing a pre-emptive strike creates exactly the "use it or lose it" pressure that makes wars start. The goal is a stable military balance where both sides believe they can defend their vital interests but neither believes it can win a first strike.
"War between the US and China is not inevitable. But preventing it will require a quality of strategic imagination, diplomatic courage, and institutional innovation that has rarely been achieved in human history. The stakes demand nothing less."
Will the US and China go to war? The honest answer is that no one knows. The structural forces identified by the Thucydides Trap are real, powerful, and operating in every dimension of the relationship. History suggests that the odds are against peace — but history also shows that determined, visionary leadership can beat those odds. The 25% of cases where war was avoided were not accidents. They were the product of extraordinary statecraft, institutional creativity, and a willingness to see the world from the adversary's perspective.
The US-China rivalry is the defining geopolitical challenge of the 21st century. How it is managed will determine whether this century is remembered for the catastrophe it produced or the catastrophe it averted. The Thucydides Trap is not a prediction — it is a warning. Whether we heed it is a choice.