Written after President Trump's state visit to Beijing, May 2026. Part of my notes on the Trump-Xi Beijing Summit.
Probably the most interesting moment of the entire summit, to me at least, was President Xi quoting Thucydides' Trap. I was genuinely surprised, because it's a well-debated term even in the West. And when he quoted it, it was immediately misread, triggering a direct response from President Trump. The misread: that Xi was calling America a declining nation. I think that's a significant misreading.
For those unfamiliar: Thucydides' Trap goes back 2,500 years, to the Greek historian Thucydides and his account of the Peloponnesian War. His observation: when a rising power challenges a ruling power, war becomes almost inevitable. In the original, Athens was the rising sea power; Sparta was the dominant land power. The tension between them eventually consumed both.
But let's look at who's actually playing which role of Athens and Sparta today. The US is the quintessential supreme sea power, the hegemon of naval dominance since World War II. China, despite its coastline, is fundamentally a land power, constrained by the postwar order, the first island chain and so on. Historically the land power, like Sparta, tends to hoard resources, maintain hierarchy and defend the existing order. The sea power, like Athens, tends to favor free trade, openness, exchange, creativity, etc.
But now ask yourself: who is currently promoting blockades and restrictions? And who is promoting free trade and open exchanges? We see the line of Athens and Sparta characteristics interchanging and blurring between the rivalry of China and the US. The roles don't map cleanly onto the original framework anymore.
The term itself was modernized by Harvard professor Graham Allison, who coined "Thucydides' Trap" as a political science concept. Though even in the West, the theory is debated, because history keeps producing exceptions. Spain and Portugal in the late 15th century. Britain and the United States in the early 20th. Even the US and the Soviet Union throughout the Cold War produced only proxy wars, not direct confrontation.
So I think President Xi quoting Thucydides' Trap was far from signaling that America is a declining nation. In Chinese culture, that's simply not how face works. The actual message, at least in my read, is far simpler and more direct: if something looks like a trap, it probably is one. So let's both be careful not to walk into it.