In this episode of A Political Talk Show, host Dennis “Sonar” Greene takes listeners deep into Plato’s The Republic, one of the most influential works in Western political philosophy. Recorded as part of a larger series on the foundations of political thought, the discussion explores Plato’s central question: What is justice? Greene unpacks the famous debates between Glaucon, Thrasymachus, and Plato’s own vision of justice as an intrinsic good. He outlines Plato’s blueprint for the ideal city (Kallipolis), explaining the three social classes—producers, auxiliaries, and philosopher‑guardians—and the principle of specialization that keeps the city in balance. A highlight of the episode is the Allegory of the Cave, where Greene explains how Plato’s metaphor for ignorance and enlightenment still resonates today in debates about truth, education, and democracy. The episode also covers Plato’s warning about the cycle of regimes—from aristocracy through democracy to tyranny—and why his concerns about freedom turning into chaos remain strikingly relevant. Perfect for students, educators, and anyone curious about political theory, justice, democracy, and the history of ideas, this episode sets the stage for upcoming discussions on Aristotle, Augustine, Hobbes, and Tocqueville.