The Republic is a philosophical dialogue by the ancient Greek philosopher Plato, written in the 4th century BC. It is one of the most influential works of philosophy and political theory, and is widely considered to be Plato's magnum opus. The dialogue covers a wide range of topics, including
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.