The Thucydides Trap Is Being Read Backwards

You know the line. The strong do what they can, and the weak suffer what they must.

That single sentence made Thucydides the patron saint of realism. It is the load-bearing quote for realpolitik, for power politics, for gunboat diplomacy, for the entire school of thought that says stated principle is decoration and capability is the only thing that actually moves. Last week Jonathan Kirshner argued on Dmitri Kofinas’s Hidden Forces that the line has been read backwards for 2,400 years.

I disagree with a good number of his conclusions. That is not a reason to skip the episode. That is the reason to listen to it. The most valuable thing an expert can do is take a text you thought you understood and show you that you have been holding it upside down.

What the Thucydides trap actually says about rising powers

We have been circling this text all year. In January we ran a guest piece by John Butler built around the Peloponnesian War, the Melian dialogue, and the Thucydides trap, published as The Triumph of Geopolitics. A podcast with him followed after the Iran conflict broke out. In May we walked through the framework again in The Thucydides Trap, after Xi opened a bilateral summit with Trump by naming it directly.

Three passes at the same 2,400-year-old text in a single year, on a research service that is nominally about capital markets. Kirshner’s reading is the reason for a fourth.

The popular version most people carry comes from Graham Allison’s Destined for War, which examined sixteen historical cases of a rising power confronting an established one and found that twelve ended in war. When the chairman of the Chinese Communist Party uses a Harvard professor’s frame as his opening statement in a room with the American president, the frame has stopped being academic.

Kirshner does not think much of the book. And his reading of the source material puts the trap somewhere else entirely.

Athens did not fall because it took on a bigger power. Athens fell because of what it became while it was winning.

That is the reversal. Here is what it costs you if you have the direction right and the mechanism wrong.