As this overview makes clear, the center of Plato's Republic is a contribution to ethics: a discussion of what the virtue justice is and why a person should be just. Yet because Socrates links his discussion of personal justice to an account of justice in the city and makes claims about how good and bad cities are arranged, the Republic sustains reflections on political questions, as well.

Video about the Canterbury Cathedral. You can see the marvelous architecture of the building and the reasoning behind it all.