(c. 460 BCE – c. 395 BCE) A great ancient Greek historian and author of the History of the Peloponnesian War, which recounts the 5th century BCE war between Sparta and Athens to the year 411 BCE.

The idea that when an emerging power threatens to replace a great power violent conflict becomes more likely.

plural of Thucydides trap

An apparent tendency towards war when an emerging power threatens to displace an existing great power as a regional or international hegemon.

Of or pertaining to the writings of Thucydides.