When a rising power threatens an established power, war becomes likely.
The historical base rate behind the claim is disputed — Allison's own case list has been challenged on both the count and the coding. The framing has nonetheless shaped a decade of US-China commentary.
In practice
- A foreign ministry briefs its minister that conflict is structurally likely, and the briefing moves the procurement budget before it moves any event.
- A second-placed firm reads the leader's investment as aggression and matches it, and both spend a decade preparing for a fight neither wanted.
- Possible explanations
- One explanation is power-transition logic: a rising power wants a settlement matching its strength, and the established power fears the cost of conceding. Another is domestic, since leaders on both sides can gain from treating rivalry as inevitable.
- In its favour
- Power-transition research does find war more likely around parity than at either extreme, which is the mechanism the phrase names.
- Against it
- The list of sixteen cases has been challenged on both selection and coding, historians dispute that Thucydides made the claim attributed to him, and treating war as likely carries its own risk of becoming self-fulfilling.
- Standing
- The historical base rate behind the claim is disputed.
- Further reading
- Wikipedia
- Subject
- Law & Politics
- Essay
- Competing accounts of how power works