The Athenian philosopher whose dialogues invented Western philosophy's central questions — the nature of knowledge, justice, beauty, and the good life — and whose theory of Forms, defense of philosopher-kings, and suspicion of democracy have been argued with, built upon, and reacted against for 2,400 years
Whitehead famously said that all Western philosophy is "a series of footnotes to Plato." The claim is hyperbole, but it points at something real. Plato did not just contribute to Western philosophy — he invented most of its central questions. What is knowledge and how do we distinguish it from mere belief? What is justice — in the soul and in the city? What is beauty, and why does it draw us toward something beyond itself? What form of government best serves human flourishing? Plato asked these questions, proposed answers that have endured as positions worth taking seriously, and created the literary form — the philosophical dialogue — that made philosophy a living investigation rather than a dogmatic system.