Abstract
At the beginning of Book II of the Republic, Glaucon and Adeimantus ask Socrates to tell them what it is to be just or unjust, and why a man should be the former. Socrates suggests in reply that they consider first what it is for a polis to be just or unjust—a polis is bigger than an individual, he says, so its justice should be more readily visible. Now if we were to view in imagination a polis coming into existence, he goes on, we should see also its justice and injustice coming into existence, and this might help us to discover what these qualities are.