Analyse the evolution of US-China relations and evaluate the causes and dangers of their growing strategic rivalry

What this dot point is asking

SEAB wants you to analyse how the relationship between the United States and China evolved, from the strategic rapprochement of the 1970s through decades of economic engagement to the strategic rivalry of recent years, and to evaluate the causes and dangers of that rivalry. The key analytical move is to weigh structural explanations, the power transition between a rising and an established power, against contingent ones, the failure of the engagement bet, ideology, and specific disputes such as trade, technology and Taiwan. You should assess how inevitable the rivalry is and how dangerous it could become. Your judgement should determine whether conflict is structurally driven and whether it can be contained.

The answer

Rapprochement and the strategic opening

The modern relationship began with a strategic surprise. During the Cold War, the United States and China had been adversaries, but in the early 1970s, driven by their shared rivalry with the Soviet Union, they moved toward rapprochement, symbolised by the American opening to China and the eventual normalisation of relations by 1979. This Cold War alignment, an entente against Moscow, set the stage for the engagement that would follow once China began to reform and open its economy.

The era of engagement

For roughly three decades from the start of reform, the relationship was defined by engagement. The United States and the wider West deliberately integrated China into the global economy, trading with it, investing in it, transferring technology, and supporting its accession to the World Trade Organization in 2001. The strategic premise, the "engagement bet," was that economic integration and growing prosperity would gradually make China more liberal at home and a more cooperative "responsible stakeholder" in the international order, perhaps even moving it toward political reform. For decades the relationship, though punctuated by tensions (over Tiananmen, Taiwan, trade and human rights), was anchored by this logic and by deepening economic interdependence.

The turn to strategic rivalry

In recent years the relationship has shifted decisively toward strategic rivalry. The American consensus moved to the view that the engagement bet had failed: China had grown immensely powerful without liberalising politically, had become more assertive abroad, and was seen as a strategic competitor rather than a prospective partner. This shift produced an open trade conflict, with tariffs imposed in both directions, and, more fundamentally, a technology conflict, with the United States restricting China's access to advanced technologies such as high-end semiconductors and China racing for self-sufficiency. Competition extended across the military, technological, economic and ideological domains. The framing on both sides hardened from cooperation to competition, and the relationship became the central axis of contemporary great-power politics.

The structural explanation: power transition

A central explanation for the rivalry is structural. International-relations theory, drawing on the ancient historian Thucydides, warns of the danger when a rising power approaches the strength of an established, dominant one: the rising power demands more status and influence, the established power fears displacement, and mutual suspicion can drive them toward conflict, the so-called "Thucydides trap." On this reading, the US-China rivalry is the natural and largely inevitable consequence of China's rise toward parity with the United States. As China became the world's second-largest economy and a formidable military power, competition with the reigning power was always likely, regardless of the particular issues in dispute.

Beyond structure: choices, ideology and flashpoints

The strongest answers insist that structure is not the whole story. The rivalry also has contingent drivers. The collapse of the engagement bet was a specific shift in American thinking and policy. Ideological difference, between a liberal democracy and a one-party state, sharpens mutual distrust and frames the competition as systemic. And there are concrete flashpoints, above all Taiwan, but also the South China Sea, trade imbalances and technology, any of which could trigger crisis. These factors are products of choices and circumstances, not pure structure, which means the intensity and the trajectory of the rivalry are shaped by decisions that could, in principle, be made differently.

The dangers, and the restraints

A full evaluation weighs the dangers against the restraints. The dangers are serious: a militarised rivalry between nuclear-armed powers, with a live flashpoint over Taiwan, carries the risk of crisis and even war, and a broad decoupling could fracture the global economy. But there are powerful restraints. The two economies remain deeply interdependent, giving both sides strong incentives to avoid open conflict, and nuclear deterrence makes direct war catastrophically risky. These restraints do not guarantee peace, but they mean that rivalry need not lead to conflict, and that managed competition is possible.

Weighing the rivalry

The most accurate judgement is that the US-China rivalry is largely the product of a structural power transition, which makes intense competition highly likely, but is not strictly inevitable in its form or its outcome. It is also driven by the failure of engagement, by ideology, and by specific disputes that statecraft could manage or mishandle. War is not predetermined: deep interdependence and nuclear deterrence give both sides strong reasons to keep competition below the threshold of conflict. The rivalry is therefore best understood as structurally driven but contingent in its trajectory, dangerous but not destined for war.

Examples in context

Example 1. China's WTO accession and the engagement bet. Western support for China's entry into the WTO in 2001 was the high point of the engagement strategy, integrating China into the global trading system in the expectation that prosperity would make it more liberal and cooperative. The later judgement that this bet failed, China became powerful without political reform, is the pivot on which the American shift to rivalry turned. It is the clearest example of the logic, and the disappointment, that drove the change in the relationship.

Example 2. The trade and technology conflict. The imposition of tariffs in both directions and, more fundamentally, American restrictions on China's access to advanced technologies such as high-end semiconductors, met by China's drive for technological self-sufficiency, exemplify the turn to open rivalry. The technology conflict in particular shows the competition is strategic, not merely commercial: it concerns which power leads in the technologies that will shape future economic and military strength, the core of the contest.

Try this

Q1. Explain the premise of the "engagement bet." [4 marks]

• Cue. That integrating China into the global economy and raising its prosperity would gradually make it more liberal at home and a more cooperative "responsible stakeholder" abroad.

Q2. Explain what the "Thucydides trap" suggests about US-China relations. [12 marks]

• Cue. That when a rising power (China) approaches the strength of an established one (the US), mutual fear and competition make conflict likely, so the rivalry is structurally driven by the power transition.

Q3. "The US-China rivalry is dangerous but not destined for war." How far do you agree? [20 marks]

• Cue. Argue structure and flashpoints like Taiwan create real danger of conflict, but deep interdependence and nuclear deterrence give strong reasons to avoid war; judge the rivalry as structurally driven yet contingent, war avoidable through managed competition.