- Plato did not establish a specific city called Plato City. However, he was a Greek philosopher who proposed an ideal city-state known as Kallipolis in his famous work "The Republic". In Kallipolis, Plato envisioned a utopian society governed by philosopher-kings, where justice, wisdom, and harmony prevailed. The city was divided into three classes: rulers, guardians (soldiers), and producers (common citizens). Plato's philosophical ideas continue to shape political and ethical thought today, but no physical city was created based on his concept of Kallipolis.