The Thucydides Trap is a term for the dangerous dynamic that emerges when a rising power threatens to displace an established one, making war between them more likely. Popularized by Harvard political scientist Graham Allison, the concept draws on the ancient Greek historian Thucydides, who wrote that the growth of Athenian power and the fear it created in Sparta made the Peloponnesian War inevitable. Allison examined 16 historical cases in which this pattern played out over the last 500 years and found that 12 of them ended in war. The idea has become the dominant frame for discussing whether the United States and China are on a collision course, but the scholarly community is far from unanimous that the frame fits.
Where the Term Comes From
Thucydides wrote his “History of the Peloponnesian War” in the fifth century BCE, documenting the conflict between Athens and Sparta that lasted nearly three decades. His observation was deceptively simple: Athens was growing in power, Sparta feared losing its dominant position, and that structural tension made peaceful coexistence increasingly difficult. Neither side had to want war. The fear and insecurity created by the shifting balance pushed them toward it anyway.
Graham Allison revived this idea in a 2012 essay and later expanded it in his 2017 book “Destined for War.” He surveyed roughly 500 years of great-power rivalries and identified 16 cases in which a rising state challenged an established one. In four of those cases, the transition happened without a major war. In the other twelve, it didn’t. The term “Thucydides Trap” was Allison’s shorthand for the structural stress that builds during these power shifts, the logic being that rising and ruling powers tend to stumble into conflict not because they choose it, but because the situation itself generates escalatory dynamics that outpace diplomacy.
The Academic Backbone
The scholarly foundation for the Thucydides Trap didn’t begin with Allison. It rests heavily on power transition theory, developed in the late 1950s by political scientist A.F.K. Organski. Organski argued that the international system is hierarchical: a dominant power sits at the top, and when a dissatisfied rising power approaches parity with it, the risk of war spikes. The danger isn’t just that two countries are strong. It’s that the challenger is gaining ground fast enough to unsettle the existing order, while the dominant power faces the choice of accommodating the newcomer or pushing back before it’s too late.
Organski actually predicted China’s rise nearly 60 years before it became the centerpiece of Washington foreign-policy debates. But he was far more cautious than today’s pundits about what that rise meant for war. In his original work, he was circumspect about predicting a great-power conflict between China and the United States, despite forecasting China’s remarkable economic ascent.1International Area Studies Review. Power transition theory and the rise of China The routine comparisons between a rising China and pre-World War I Germany are a feature of popular commentary, not of Organski’s original theory.
The Peaceful Exception That Proves the Complexity
The fact that four of Allison’s 16 cases ended peacefully is itself revealing. The most studied of these is the transition from British to American global dominance in the late nineteenth and early twentieth centuries. The United States steadily overtook Great Britain as the world’s largest economy, threatened British imperial interests in the Americas, and challenged the Royal Navy’s dominance of the Atlantic. By the structural logic of power transition theory, war seemed imminent.2The Chinese Journal of International Politics. The Peaceful Transition of Power from the UK to the US
It didn’t happen. Over the span of a few decades, Britain and the United States resolved territorial disputes, aligned diplomatically, and ultimately became the closest of allies. What made this possible? Scholars point to shared cultural and linguistic ties, democratic governance on both sides, overlapping economic interests, and Britain’s pragmatic decision to accommodate American expansion rather than resist it. The lesson for the Thucydides Trap debate is that structural pressure doesn’t mechanically produce war. The choices made by leaders, the nature of the political systems involved, and the institutional context all matter enormously.
Why Critics Call the Framework Misleading
The Thucydides Trap has drawn sharp criticism from international relations scholars who argue that it simplifies history to the point of distortion. One common objection is that the concept lends itself to a sensationalist characterization of a rising China and a declining United States, when the United States in fact continues to enjoy important enduring advantages over China in areas like military technology, alliance networks, and financial infrastructure.3Vestnik RUDN. International Relations. Why Thucydides’ Trap Misinforms Sino-American Relations Framing the relationship as a binary confrontation between a rising and falling power may feel clean, but it leaves out the enormous complexity of a world in which the two countries are simultaneously rivals, trading partners, and co-managers of global challenges like climate change.
Another line of criticism targets the historical cases themselves. Allison’s 16 cases span five centuries, multiple continents, and radically different political systems. Critics argue that lumping together sixteenth-century Iberian rivalries with twentieth-century Cold War dynamics creates an illusion of a recurring pattern where each case actually turned on its own highly specific circumstances. The structural stress of a power shift was present in each case, but what determined war or peace was everything else: alliances, domestic politics, geography, ideology, economic ties, and often sheer accident. Treating the structural stress as the primary explanatory variable may confuse a recurring background condition with the actual cause of conflict.
Will China Actually Overtake the United States?
Embedded in the Thucydides Trap framework is an assumption that the challenger will continue rising until it reaches or surpasses the dominant power. In the China case, this means assuming that China’s economy and military will converge with or overtake America’s. But economists have shown that convergence is conditional, not inevitable. Sometimes poorer countries grow faster than rich ones, and sometimes they fall further behind.4Journal of Global Security Studies. Conditional Convergence and the Rise of China: A Political Economy Approach to Understanding Global Power Transitions
China’s growth over the past four decades has been extraordinary, but maintaining that trajectory depends on a set of conditions that are not guaranteed: continued productivity gains, a working-age population that is currently shrinking, manageable levels of debt, and institutional flexibility to adapt to economic headwinds. Some economists project that China’s GDP growth will slow substantially in the coming decades, possibly stabilizing well below the level needed to overtake the United States in per-capita terms. If that happens, the core premise of the Thucydides Trap dissolves. You can’t have a power transition if the power never fully transitions. This doesn’t mean competition disappears, but it reframes the relationship as a long-term rivalry between two large powers rather than the existential clash of a hegemon and its successor.
Technology as a Modern Pressure Point
Even if the Thucydides Trap framework oversimplifies the big picture, it captures something real about specific domains of competition. Technology is the most obvious one. As China has challenged American dominance in areas like artificial intelligence, telecommunications, and semiconductor manufacturing, the United States has responded with increasingly aggressive tools: export controls, entity list designations, and investment screening designed to deny China access to technologies that could bolster both its economic and military capabilities.5Asia and the Global Economy. Geoeconomics of US-China tech rivalry and industrial policy
The tech competition has a Thucydides Trap quality to it even if the broader framework doesn’t hold. The dominant power sees the challenger gaining ground in a strategically critical area and moves to slow or block that advance. The challenger views these restrictions as an attempt to preserve an unfair hierarchy and doubles down on self-reliance. Each side’s response makes the other side’s fears seem more justified. This spiral can happen in the technology domain regardless of whether China’s overall power is converging with America’s. The semiconductor restrictions the U.S. imposed starting in 2022, targeting China’s ability to manufacture and import advanced chips, are the sharpest example. They represent a deliberate effort to lock in a technological advantage, which is exactly the kind of action that power transition theory predicts from a hegemon feeling threatened.
Domestic Politics on Both Sides
One dimension the Thucydides Trap tends to underplay is the role of domestic politics. The framework focuses on the structural relationship between two states, treating them almost as unitary actors. In reality, what happens inside each country can amplify or dampen the competitive dynamic. In the United States, a strong bipartisan consensus has formed in favor of a more confrontational approach toward China, replacing the engagement strategy that prevailed for decades. In China, domestic pressures, including the imperative to satisfy nationalist sentiment and Xi Jinping’s consolidation of personal authority, could push toward increasingly assertive foreign policy.6China-US Competition. US-China Strategic Competition in Each Domestic Context
The clash between the two countries’ political systems intensifies the friction. A liberal democracy and a one-party state tend to view each other with deep suspicion not just because of power differentials, but because each system implicitly challenges the legitimacy of the other. American politicians have electoral incentives to be seen as tough on China. Chinese leaders face pressure to demonstrate that their system can deliver prosperity and international respect. These domestic dynamics can push both sides toward escalation even when the structural balance of power hasn’t changed much. A version of the Thucydides Trap can operate at the level of domestic political incentives, not just great-power structure.
The Self-Fulfilling Prophecy Problem
Perhaps the sharpest criticism of the Thucydides Trap is that it risks becoming what it describes. By framing U.S.-China relations as a historically recurring pattern that usually ends in war, the concept can shape the expectations of policymakers, military planners, and the public in ways that make conflict more likely. If leaders on both sides internalize the idea that war is the probable outcome, they may adopt strategies, like arms buildups and preemptive containment, that confirm the other side’s worst fears.
Scholars have argued that because the Thucydides Trap lends itself to alarmist characterizations of the relationship, it can abet views and feelings that engender precisely the self-fulfilling prophecy it warns about.7Vestnik RUDN. International Relations. Why Thucydides’ Trap Misinforms Sino-American Relations Media coverage that frames every trade dispute or military exercise as evidence of the trap’s tightening grip makes the narrative feel inevitable, which in turn narrows the political space for compromise. The irony is that a concept designed to sound the alarm about war may, by making war feel like the default outcome, reduce the urgency of working to prevent it.
How Institutions Absorb Power Shifts
The modern international system has something that Thucydides’ world and many of Allison’s historical cases lacked: a dense web of international institutions designed to manage disputes and absorb shifts in power without resorting to force. The United Nations Security Council, the World Trade Organization, the International Monetary Fund, and dozens of regional organizations create channels for negotiation, norm-setting, and dispute resolution that didn’t exist during most of the historical transitions the Thucydides Trap draws on.
That doesn’t mean institutions automatically prevent conflict. But research on how international institutions adapt to power shifts suggests the picture is more nuanced than a simple collision between rising and falling states. Both emerging and established powers challenge the institutional status quo when shifts occur, but they don’t always rely on raw power bargaining. In some areas, they use strategies like co-optation, persuasion, and rhetorical pressure to reshape institutions from within.8Global Policy. The Adjustment of International Institutions to Global Power Shifts: A Framework for Analysis China’s growing role in institutions like the Asian Infrastructure Investment Bank and its efforts to reshape WTO norms reflect this pattern. The process is contentious and slow, but it represents a mechanism for power redistribution that operates outside the binary of war or capitulation.
What Crisis Prevention Actually Looks Like
If the Thucydides Trap captures a real risk, even an overstated one, the practical question is what reduces that risk. The most direct answer involves crisis management: establishing channels and norms that prevent misunderstandings, accidents, or localized incidents from escalating into broader conflict. This is less dramatic than the grand strategic debates about containment versus engagement, but it may matter more in practice.
Policy researchers have recommended treating crisis management as a whole-of-government effort rather than a narrow military task. That means more extensive and coordinated dialogue across multiple tracks, from formal government-to-government channels to semi-official and academic exchanges. It means jointly endorsed crisis management guidelines, informal back-channel communication between trusted interlocutors, and regularized links between operational military units.9Quincy Institute for Responsible Statecraft. Avoiding the Abyss: An Urgent Need for Sino-U.S. Crisis Management The goal of these mechanisms is to reduce worst-case thinking and provide pathways for de-escalation before a confrontation spirals out of control.
The U.S. and China have had some of these channels at various points, including military-to-military hotlines and regular diplomatic dialogues, but they have repeatedly broken down during periods of tension. After House Speaker Nancy Pelosi’s visit to Taiwan in August 2022, China suspended several communication channels with the U.S. military. The channels were partially restored later, but their fragility illustrates the problem: the mechanisms for preventing escalation are most needed exactly when political conditions make them hardest to maintain. The lesson from scholarship on this topic is that crisis management infrastructure needs to be built during calmer times and insulated as much as possible from the broader swings in the relationship.
Nuclear Weapons and the Ceiling on Escalation
One variable that fundamentally distinguishes the U.S.-China case from most historical power transitions is nuclear weapons. Every pre-nuclear case in Allison’s dataset played out in a world where a rising power could plausibly calculate that a decisive war, however costly, was winnable. Nuclear arsenals change that calculus. The United States and China both possess nuclear forces capable of inflicting catastrophic damage on the other, which creates a ceiling on escalation that didn’t exist when Athens challenged Sparta or when Germany challenged Britain.
This doesn’t eliminate the risk of conflict. Conventional clashes, proxy wars, and limited military confrontations remain possible even between nuclear-armed states, as the history of U.S.-Soviet relations showed. But nuclear deterrence does tend to keep conflicts below a certain threshold. The concern today is less about a deliberate march to total war and more about an accidental or uncontrolled escalation, say, a naval incident near Taiwan or a miscalculation during a military exercise, that spirals beyond what either side intended. The Thucydides Trap, as originally conceived, doesn’t account well for this distinction. It was designed to explain why great powers end up in major wars, not why they might stumble into limited ones while trying to avoid the big one.
Why East Asian History Complicates the Picture
Allison’s historical cases draw overwhelmingly on European and Western examples: Hapsburg Spain versus the Ottomans, France versus the Hapsburgs, Britain versus Germany, the United States versus the Soviet Union. Scholars have pointed out that East Asia has its own long history of power transitions that don’t fit the Western template neatly. The tributary system that organized much of East Asian international relations for centuries operated on different principles than the European balance-of-power system, with a dominant state (usually China) at the center and surrounding states acknowledging its primacy through ritual and trade rather than through the constant military balancing that characterized European politics.
This matters because the Thucydides Trap implicitly assumes that power transitions generate fear and competition in roughly the same way everywhere. If the historical dynamics of power transitions in Asia followed different patterns, with different norms about hierarchy, accommodation, and the use of force, then importing a framework built on European cases may mislead as much as it illuminates. A rising China operating within its own historical and cultural context may not behave the way the European analogies suggest. That doesn’t make the relationship safer by default, but it does mean the Thucydides Trap is a less reliable guide to what comes next than its popularity implies.