Plato 
The Republic by Plato 

The Republic is a Socratic dialogue written by Plato around 380 BC concerning the definition of justice and the order and character of the just city-state and the just man.The dramatic date of the dialogue has been much debated and though it must take place some time during the Peloponnesian War, 'there would be jarring anachronisms if any of the candidate specific dates between 432 and 404 were assigned’.It is Plato’s best-known work and has proven to be one of the most intellectually and historically influential works of philosophy and political theory.Plato was a Classical Greek philosopher, mathematician, student of Socrates, writer of philosophical dialogues, and founder of the Academy in Athens, the first institution of higher learning in the Western world.