that justice is good for its' own sake, Socrates makes up a perfectly just city and examines the souls of the citizens in the city to find justice. One might ask why Socrates uses this method to answer Glaucon and Adeimantus' charge. One possible reason is that the he wants to use city as a model analogous to the soul of the individual. Another reason could be that Socrates wants to avoid the mistakes made by
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