The Republic, by Plato, is a Socratic dialogue written around 380 BC that explores justice, the ideal city-state (Kallipolis), and the just man, arguing that the just man is happier than the unjust one. Key themes include the theory of Forms, the immortality of the soul, and the role of philosopher-kings, who rule the ideal city. The work famously proposes a communist system for the guardian class, including communal wives and children, to ensure state unity.
