For roughly thirty years after the Cold War ended, American foreign policy operated on a broadly shared assumption: engagement with China would make China more like the United States. As China grew wealthier, its middle class would demand political rights. As it integrated into the global economy, it would accept the rules-based international order. The combination of prosperity, interdependence, and institutional participation would gradually liberalize the Chinese system.
By the mid-2010s, this assumption had been officially abandoned. China under Xi Jinping was more authoritarian than it had been in decades, more militarily assertive in the South China Sea and around Taiwan, and more explicitly committed to displacing American primacy in Asia and eventually globally. The United States declared China a "strategic competitor" in its 2017 National Security Strategy. The era of engagement was over.
What replaced it is the defining geopolitical competition of the 21st century: a multidimensional rivalry between the world's largest economy (by purchasing power parity, China), the world's largest economy by nominal GDP and dominant military power (the United States), and a second country with every aspect of national power — economic, military, technological, and ideological — to eventually challenge American global leadership.
Understanding this rivalry means understanding not just what each side wants but what each side fears, and why the structural dynamics of power transition make this competition so difficult to manage peacefully.
"The defining feature of our time is a fundamental competition between open and closed societies, between democracy and autocracy, and the United States must lead the democracies of the world to meet the challenges from China." — President Joe Biden, address to Congress (April 2021)
"Some countries claim to be democratic but in fact they practice a 'my-way-or-the-highway' hegemony that smacks of bullying. This is not democracy, it's the use of democratic values to bully other countries." — Chinese President Xi Jinping, CCP centenary celebration (July 2021)
Key Definitions
Great power competition — A term describing international relations dominated by competition between major powers with global reach and the capacity to shape the international system. The current usage refers specifically to the US-China competition and, secondarily, to US-Russia tensions. Great power competition is considered more dangerous than ordinary interstate conflict because the stakes are systemic — the outcome determines the rules, institutions, and values governing the international order.
Thucydides Trap — The historical tendency for rising powers challenging established powers to produce war. Political scientist Graham Allison studied 16 cases over 500 years where a rising power challenged a ruling power; 12 ended in war. The term comes from Thucydides' analysis of the Peloponnesian War: Sparta went to war with Athens because it feared the consequences of Athenian growth. The US-China dynamic fits this pattern structurally, though both sides have nuclear weapons and enormously interdependent economies, complicating the analogy.
Hegemony — The dominant position of one state in the international system, in which that state sets the rules, maintains global public goods (freedom of navigation, currency stability, conflict prevention), and shapes others' behavior through a combination of hard power (military) and soft power (cultural and ideological appeal). The United States has been the global hegemon since 1991; China's goal is at minimum to become the regional hegemon in Asia and at maximum to become a coequal global power.
Taiwan — An island democracy of 23 million people that has governed itself independently since 1949, when the defeated Nationalist government retreated there after losing the Chinese Civil War. China's government regards Taiwan as a breakaway province that must be reunified with the mainland — by force if necessary. The US maintains "strategic ambiguity": it does not formally recognize Taiwan's independence but sells it defensive weapons and has grown more explicit about defending it militarily.
TSMC (Taiwan Semiconductor Manufacturing Company) — The world's most advanced semiconductor manufacturer, producing over 90% of the world's chips below 10 nanometers — the chips that power AI, advanced weapons systems, smartphones, and modern computing. TSMC's presence in Taiwan makes Taiwan strategically critical beyond its political significance. A Chinese invasion that captured or destroyed TSMC would be economically catastrophic for the global technology sector.
Belt and Road Initiative (BRI) — China's global infrastructure investment program, launched by Xi Jinping in 2013. Over 140 countries have signed BRI agreements covering roads, railways, ports, power plants, telecommunications, and digital infrastructure. Chinese loans and construction contracts build Chinese influence with recipient countries while absorbing China's excess construction capacity and extending Chinese economic networks globally.
South China Sea dispute — China claims approximately 90% of the South China Sea through the "nine-dash line" — a claim rejected by the 2016 Permanent Court of Arbitration ruling (which China refuses to recognize). The sea is one of the world's busiest shipping lanes, contains significant energy reserves, and is home to disputed islands whose control matters for military positioning. China has built artificial islands and militarized them with runways and missile batteries.
Technology decoupling — The effort to reduce interdependence in strategically sensitive technology sectors — particularly semiconductors, AI, quantum computing, and telecommunications. The US has restricted exports of advanced semiconductor manufacturing equipment and chips to China, targeting companies like Huawei. China has responded with massive investment in domestic semiconductor development. Full technology decoupling would be extremely costly for both economies.
CHIPS Act — The US Creating Helpful Incentives to Produce Semiconductors Act (2022), providing $52 billion in subsidies to build semiconductor manufacturing in the United States, reducing dependence on Taiwanese production. Combined with allied investment in Japan (TSMC plant), the Netherlands (ASML restrictions on China), and South Korea, the act is part of a broader effort to restructure semiconductor supply chains away from Taiwan risk.
Economic interdependence — In 2023, US-China bilateral trade totaled approximately $575 billion, making China the third-largest US trading partner. US companies have approximately $1 trillion in investments in China. Chinese investors hold approximately $800 billion in US Treasury securities. This interdependence creates mutual vulnerability — aggressive action by either side imposes costs on both — but also creates leverage.
Historical Background: From Partnership to Competition
Engagement (1972–2016)
Nixon's 1972 opening to China began the era of US-China engagement. The initial strategic logic was realpolitik: engaging China against the Soviet Union. After the Cold War, the logic shifted to integration: bring China into the international economic and political order, and its development would stabilize rather than destabilize it.
China's admission to the World Trade Organization in 2001 represented the high-water mark of engagement. The US supported Chinese WTO membership, accepting significant trade concessions in exchange for expectations that WTO rules would discipline Chinese economic behavior. US corporations invested heavily in Chinese manufacturing, building supply chains that produced the low-cost goods that drove down consumer prices for American households.
The trade-offs were more complex than anticipated. The "China shock" — the economic impact of Chinese manufacturing competition — produced significant job losses in US manufacturing communities, a dynamic documented by economists David Autor, David Dorn, and Gordon Hanson. The communities affected were concentrated in the Midwest and South, contributing to the political conditions that eventually produced the 2016 election and the trade war.
Meanwhile, China's economic growth and technology capabilities advanced more rapidly than US assessments had projected. The Chinese government's industrial policies — subsidies, market access restrictions, and intellectual property requirements — accelerated this growth in ways that WTO rules did not fully constrain.
The Turning Point
Several events and assessments crystallized the shift from engagement to competition:
Xi Jinping's consolidation of power (2012–2018): Xi reversed the collective leadership norms that had governed the Chinese Communist Party since Deng Xiaoping, concentrating power in his own hands, abolishing term limits for the presidency, and increasing party control over economic, social, and media life. This signaled a more assertive, less reformist China than engagement theory had predicted.
South China Sea militarization (2013–2016): China constructed and militarized artificial islands in disputed waters, defying international legal rulings and signaling willingness to use force to establish facts on the ground in territorial disputes.
Cybertheft and economic espionage: US intelligence assessments documented systematic Chinese state-sponsored theft of US corporate intellectual property on a massive scale — "the greatest transfer of wealth in history," as NSA Director Keith Alexander described it in 2012.
Huawei and 5G (2018-present): The US moved to block Huawei from 5G networks, arguing that the company's equipment posed intelligence and security risks. The case illustrated a broader concern: Chinese technology companies operating in global markets could provide the Chinese government with intelligence access and potential infrastructure control.
The Four Dimensions of Rivalry
1. Economic Competition
China overtook Japan as the world's second-largest economy in 2010 and is projected to surpass the United States as the largest nominal GDP economy in the 2030s (it already exceeds the US by purchasing power parity). This economic rise is the material foundation of Chinese power.
The trade war beginning in 2018 imposed tariffs on hundreds of billions of dollars of goods in both directions. The economic effect was modest for both large economies, but the political signal was significant: the US was willing to accept economic costs to push back on Chinese trade practices it considered unfair.
More consequential is the technology competition. Advanced semiconductors, AI systems, quantum computing, and biotechnology are the foundations of both economic productivity and military capability. The US effort to restrict China's access to advanced semiconductor technology — through export controls and restrictions on equipment sales — aims to maintain a technological lead in these domains.
| Metric | US | China | Note |
|---|---|---|---|
| Nominal GDP (2024) | ~$28 trillion | ~$18 trillion | US leads nominally |
| PPP GDP (2024) | ~$28 trillion | ~$35 trillion | China leads by PPP |
| R&D spending | ~$700 billion | ~$500 billion | US leads but gap closing |
| STEM graduates annually | ~800,000 | ~3.5 million | China far ahead |
| Patent filings | ~660,000 | ~1.6 million | China far ahead |
2. Military Competition
China has undertaken the largest peacetime military buildup in history, transforming from a force designed for local territorial defense into one capable of power projection across the Indo-Pacific region. Key developments:
Navy: China now has the world's largest navy by number of ships. It is building aircraft carriers, advanced destroyers, and submarines at a pace that has alarmed US naval planners.
Missiles: China's arsenal of precise, long-range anti-ship and anti-access missiles (DF-21D, DF-26) poses serious threats to US aircraft carrier groups in the Western Pacific — the US Navy's traditional instrument of regional dominance.
Nuclear: China is expanding its nuclear arsenal from approximately 350 warheads toward a potential goal of 1,000-1,500 warheads, building silo fields in the desert, and diversifying delivery vehicles.
Space and cyber: China has demonstrated anti-satellite capabilities, conducted extensive cyber operations against US government and corporate networks, and is investing heavily in space-based military infrastructure.
3. Technological Competition
Semiconductors are the central battlefield. The US maintains a lead in advanced chip design and the manufacturing equipment needed to produce them. Taiwan's TSMC manufactures the most advanced chips. The Netherlands' ASML makes the extreme ultraviolet lithography machines that advanced fabrication requires — only ASML can make them.
US export controls imposed in 2022-2023 restrict the export of advanced chips and chip-making equipment to China, aiming to prevent China from developing the AI and military systems that advanced semiconductors enable. China has responded with a massive domestic investment program in semiconductor development — spending estimated at over $100 billion to build indigenous capability.
The competition extends to AI, 5G telecommunications, quantum computing, and biotechnology — each representing both economic value and military application.
4. Ideological and Institutional Competition
Xi Jinping has articulated Chinese governance as an alternative model to Western liberal democracy, suited to developing countries seeking growth without the instability he associates with democratic pluralism. China's combination of economic development under one-party rule — presented as "whole-process people's democracy" — has genuine appeal in parts of the developing world that have grown frustrated with Western conditionality on aid and democratic norms requirements.
The competition plays out in international institutions. China has sought to lead UN specialized agencies, shape international standards bodies (for AI, telecommunications, and other emerging technologies), and build its own institutions (Asian Infrastructure Investment Bank, New Development Bank, Shanghai Cooperation Organisation) as alternatives to Western-dominated ones.
Taiwan: The Most Dangerous Flashpoint
Taiwan is the most acute potential flashpoint for direct US-China military conflict. China's official position is that Taiwan is a province of the People's Republic and that reunification is inevitable. Xi Jinping has stated that resolving Taiwan is a "historic mission" that cannot be passed to the next generation indefinitely.
The US does not formally recognize Taiwan as an independent country (it recognizes the People's Republic of China) but maintains extensive unofficial relations with Taiwan and sells it defensive weapons under the Taiwan Relations Act (1979). US policy of "strategic ambiguity" — not explicitly committing to defend Taiwan — was designed to deter both Chinese attack and Taiwanese independence declarations.
A Chinese military attempt to take Taiwan would be the most serious international crisis since World War II. It would:
- Trigger US military involvement (though the exact US response remains uncertain)
- Devastate global semiconductor production
- Potentially destroy the rules-based international order governing the western Pacific
- Force every country in the world to choose sides in a fundamental conflict
Both the US and China have strong incentives to avoid this outcome. The catastrophic costs of miscalculation mean that the Taiwan situation is most likely to remain in managed tension — unless a crisis escalates through accident, miscalculation, or deliberate provocation.
"The Taiwan question is a purely internal affair of China that brooks no external interference. The Chinese people have the determination and capability to safeguard national sovereignty and territorial integrity." — Xi Jinping, CCP centenary speech (July 2021)
Can the Rivalry Be Managed?
The US-China rivalry is not a Cold War repeat. The US and Soviet Union had minimal economic interdependence; US-China economic ties are deeply intertwined. Nuclear deterrence operates on both sides. Both countries have interests in cooperation on climate change, pandemic preparedness, and financial stability.
The structural danger is that competitive pressures in one domain — technology, military, Taiwan — could spill over and undermine the cooperation both sides need in others. Managing the rivalry requires maintaining communication channels even as competition intensifies, establishing clear red lines to prevent miscalculation, and finding domains where interests align enough for cooperation.
Whether that management is achievable — or whether the structural logic of great power transition makes conflict ultimately difficult to avoid — is the central question of 21st century geopolitics.
For related concepts, see Iran-Israel conflict explained, how oil shapes geopolitics, and how global alliances work.
References
- Allison, G. (2017). Destined for War: Can America and China Escape Thucydides's Trap? Houghton Mifflin Harcourt.
- Autor, D., Dorn, D., & Hanson, G. H. (2013). The China Syndrome: Local Labor Market Effects of Import Competition in the United States. American Economic Review, 103(6), 2121–2168. https://doi.org/10.1257/aer.103.6.2121
- National Security Council. (2017). National Security Strategy of the United States of America. White House.
- Posen, B. R. (2003). Command of the Commons: The Military Foundation of US Hegemony. International Security, 28(1), 5–46.
- Mearsheimer, J. J. (2001). The Tragedy of Great Power Politics. W. W. Norton.
- Economy, E. (2018). The Third Revolution: Xi Jinping and the New Chinese State. Oxford University Press.
- Luce, E. (2017). The Retreat of Western Liberalism. Atlantic Monthly Press.
- Office of the US Trade Representative. (2018, 2022). Reports on China's Acts, Policies, and Practices Related to Technology Transfer, Intellectual Property, and Innovation. USTR.
Frequently Asked Questions
What is the US-China rivalry about?
The US-China rivalry is a multidimensional competition between the world's two largest economies and military powers. It spans trade and economic competition, technological leadership (especially semiconductors, AI, and telecommunications), military competition in the Indo-Pacific, ideological competition between democracy and authoritarian state capitalism, and a broader contest over the rules and institutions governing the international order. The US has been the dominant global power since 1991; China is the only country with the economic, military, and technological capacity to challenge that dominance.
What is the Thucydides Trap?
The Thucydides Trap refers to the tendency for rising powers and ruling powers to go to war. Political scientist Graham Allison found that in 16 of the last 500 years' cases of a rising power challenging a ruling power, 12 ended in war. The term comes from the ancient Greek historian Thucydides, who wrote that the Peloponnesian War was made inevitable by the growth of Athenian power and the fear this inspired in Sparta. Allison's 2017 book applied this framework to the US-China relationship.
What happened in the US-China trade war?
The US-China trade war began in 2018 when the Trump administration imposed tariffs on \(34 billion of Chinese goods, citing unfair trade practices, intellectual property theft, and the bilateral trade deficit. China retaliated with equivalent tariffs on US goods. By 2019, tariffs applied to over \)360 billion in Chinese imports and $110 billion in US exports to China. A Phase One deal in January 2020 paused escalation but did not resolve structural disputes. The Biden administration maintained most tariffs and added technology export controls, particularly on advanced semiconductors.
Why is Taiwan central to the US-China rivalry?
Taiwan is the most acute flashpoint. China's government regards Taiwan as a breakaway province that will eventually be reunified with the mainland — by force if necessary. Taiwan functions as an independent democracy and is the headquarters of TSMC, the world's most advanced semiconductor manufacturer (producing over 90% of the world's most advanced chips). The US does not formally recognize Taiwan's independence but maintains a policy of 'strategic ambiguity' — selling Taiwan defensive weapons while not explicitly committing to military defense. A Chinese invasion of Taiwan would be the most serious geopolitical crisis since World War II.
What is the Belt and Road Initiative?
The Belt and Road Initiative (BRI) is China's massive infrastructure investment and lending program launched in 2013, funding roads, ports, railways, power plants, and digital infrastructure across Asia, Africa, Europe, and Latin America. Over 140 countries have signed BRI agreements. Critics describe it as 'debt trap diplomacy' — lending to countries that cannot repay, then leveraging the debt for strategic concessions. Supporters see it as filling genuine infrastructure gaps that Western institutions have not addressed.
What is US-China decoupling?
Decoupling refers to the effort to reduce the economic interdependence between the US and Chinese economies — particularly in strategically sensitive sectors. The US has restricted exports of advanced semiconductor technology to China, pushed to relocate semiconductor manufacturing from Taiwan to the US, scrutinized Chinese investment in US companies, and removed some Chinese companies from US stock exchanges. China has pursued self-sufficiency in semiconductors, software, and other strategic technologies. Full decoupling would be economically disruptive for both countries; what is occurring is selective decoupling in strategic sectors.