Mytilenean Debate: Athens Debates Genocide in 427 BCE

The History of Greece: Philosophy, Empire, and Endless Reinvention — Fexingo History · Jul 12, 2026 · 7m · transcript

In 427 BCE, during the Peloponnesian War, Athens faced a moral crisis. The city of Mytilene on Lesbos had revolted against the Athenian Empire. After a brutal siege, the Athenian Assembly, inflamed by the demagogue Cleon, voted to execute every man in Mytilene and enslave the women and children. But then, overnight, they reconsidered. Thucydides records the dramatic second debate, where an obscure citizen named Diodotus argued against the massacre—not on moral grounds, but on cold pragmatism. This is the story of that debate: the arguments, the vote, and the trireme that raced to Lesbos to…