The Republic of Plato is a classic work of philosophy written by the ancient Greek philosopher Plato. It is one of the most influential works of Western philosophy and is widely considered to be the foundation of Western political thought. In the Republic, Plato outlines his ideal state and explores the implications of justice,
From Wikipedia
The Republic is a Socratic dialogue authored by Plato around 375 BC, concerning justice, the order and character of the just city-state, and the just man. It is Plato's best-known work, and one of the world's most influential works of philosophy and political theory, both intellectually and historically.