ELI5: thucydides trap
// explanation
What is the Thucydides Trap?
The Thucydides Trap is when a new, strong country starts to challenge an old, powerful country for power, and this often leads to conflict [1][3]. It's like two kids fighting over who gets to be the leader of the playground—when one kid was always in charge but a new kid becomes just as strong, trouble usually starts [3].
Why does it happen?
When a country that's been in power for a long time sees a new country becoming stronger, the old power gets scared and worried [3]. The new strong country wants respect and a bigger role in the world, but the old power doesn't want to give up control, so they clash [2].
What does it feel like?
It's like when your older sibling has always been the strongest, but you're growing up and getting stronger too—now there's tension about who's really in charge [3]. Both sides feel nervous and defensive, which makes things more likely to go wrong [1].
How do you avoid it?
Countries have to talk to each other, make agreements, and find ways to share power peacefully instead of fighting [3]. They need to build trust and remember that working together is better than trying to beat each other [1][3].
// sources
The Thucydides Trap is a concept originated by Herman Wouk, the novelist and World War II veteran, who used it in his Admiral Raymond A. Spruance lecture, ...
The Harvard Thucydides's Trap Project has identified sixteen cases in which a major rising power has threatened to displace a major ruling power.
The eminent Harvard scholar Graham Allison explains why Thucydides's Trap is the best lens for understanding US-China relations in the twenty-first century.
May 16, 2026 ... A staple of foreign policy commentary, including by Trump's former chief strategist Steve Bannon, the Thucydides Trap refers to the idea that ...
May 30, 2017 ... Eminent Harvard scholar Graham Allison explains why Thucydides's Trap is the best lens for understanding the most critical foreign policy issue of our time.
Video by CBS News
Video by Harvard Kennedy School
Video by History with Cy
