Destined for War: Can America and China Escape Thucydides’s Trap?
Graham Allison, 2017 — strategy.
Allison’s Harvard team built a case file of 16 power transitions since 1500 — a rising power threatening a ruling one — and found 12 ended in war. The trap is structural, not intentional: fear in the incumbent, entitlement in the riser, and third-party sparks amplified by alliance commitments. The four peaceful cases shared one feature — off-ramp institutions built early, while off-ramps were still cheap.
Why the engine keeps this on the shelf
It anchors the great-power rivalry component of the resonance index at weight .25 and the rivalry strand of the Loom — the engine scores US–China as case 17 and watches the off-ramps, not the verdict.
The record
- Houghton Mifflin Harcourt published it in May 2017; the argument first ran as an essay in The Atlantic on 24 September 2015.
- The dataset is public and auditable: Harvard's Belfer Center Thucydides's Trap Case File documents 16 cases since 1500 in which a rising power threatened a ruling one, 12 ending in war and 4 not.
- The four peaceful cases are what the book actually argues from — among them Britain ceding primacy to the United States in the early twentieth century, and the American-Soviet rivalry ending without direct war.
- The methodological rebuttals are on the record too: critics point to a 16-case sample chosen after the fact, unclear definitions and selection bias, and the US Air Force journal Strategic Studies Quarterly published a direct challenge titled 'Graham Allison and the Thucydides Trap Myth'.
Marked passages
It was the rise of Athens and the fear that this instilled in Sparta that made war inevitable.
Thucydides, c. 400 BCE, quoted as the book’s organizing sentence. Our geopolitics projections score US-China as case 17 — the base rate is 75% war, and the exceptions are instructive.
The core claims
- War between a rising and a ruling power usually arrives through third-party incidents and alliance commitments rather than through either principal deciding to attack.
- The structural pressure is the incumbent's fear combined with the riser's sense of entitlement, which means the trap can close on leaders who all sincerely prefer peace.
Then and now
The case-17 pressure gauge has a number: PLA aircraft entered Taiwan's air defence identification zone 3,764 times in 2025, up 22.4% on 2024's 3,615. Source: Taiwan Ministry of National Defense data, compiled by CSIS ChinaPower, 2026
The economic base of the transition has already moved — China accounted for roughly 30% of global manufacturing value added in 2025, its sixteenth consecutive year as the world's largest manufacturer. Source: CSIS ChinaPower, 'Measuring China's Manufacturing Might', 2025
Both sides are funding the trap: world military spending reached $2,887 billion in 2025, with the United States at $954 billion and China at $336 billion. Source: SIPRI Fact Sheet, April 2026 (military expenditure 2025)
More on this shelf
The shelf exists because the engine reads it. See the Core, the projections, the sealed ledger, or all 81 texts.