In this episode of Ancient Greece: Philosophy, Democracy, and Endless War, Lucas and Luna explore the practice of ostracism, a uniquely Athenian democratic institution where citizens could vote to exile any political leader for ten years. They trace its origins from the reforms of Cleisthenes in 508 BCE to its first use in 487 BCE against Hipparchus, a relative of the tyrant Peisistratus. The conversation delves into the mechanics of the vote, where citizens wrote names on broken pottery shards called ostraka, and highlights the most famous cases, including Themistocles, the hero of Salamis, who was ostracized around 472 BCE and eventually defected to Persia. They also discuss the last known ostracism in 417 BCE, which targeted Hyperbolus, a demagogue, after a failed political maneuver by Alcibiades and Nicias. Lucas explains how ostracism was a safeguard against tyranny but could become a tool of political rivalry, and how it waned after the Peloponnesian War. The episode examines archaeological finds like the thousands of ostraka from the Kerameikos, some with names scratched in multiple hands, revealing organized campaigns. Luna questions whether ostracism was truly democratic or a way to silence dissent, and Lucas reflects on its legacy as a precursor to modern impeachment or recall elections.