Final answer:
Plato's Republic explores the concept of a just society and the role of philosopher-kings in governing. The philosopher-kings would rule based on virtue and the understanding of what is best for the community.
Step-by-step explanation:
In Plato's Republic, the concept of a just society is explored. Plato argues that a just city would be governed by philosopher-kings, who possess both practical and theoretical knowledge. These philosopher-kings would rule based on virtue and understanding what is best for the community they govern.