Republic

Platonis Opera Tomus IV: Tetralogia VIII. Burnet, John, editor. Oxford: Clarendon Press, 1905.

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This dialogue, featuring Socrates as the main interlocutor, explores the fundamental questions of "What is justice?" and "Is a just life happier than an unjust one?" To discern justice in the individual, Socrates and his companions embark on a mental construction of an ideal state. Within this state, they define justice as the harmony among the three parts of the soul—reason, spirit, and appetite—which correspond to the social classes of the polis. The discussion proceeds to outline the education of the "philosopher-king" who must govern the city, illustrated through the transcendent "Form of the Good." In the later sections, the dialogue contrasts the misery of the tyrannical soul with the supreme happiness of the just person through an analysis of degenerating constitutions. Finally, after a critique of imitative poetry and a proof of the immortality of the soul, the work concludes with the "Myth of Er," encouraging readers to choose a life of wisdom and justice.