Glaucon argued that, by nature, doing injustice is good but the law can force you to act against that. According to Glaucon, justice is naturally bad and injustice is naturally good. No one willingly is just; therefore if you gave people the power to be unjust without suffering any penalty then they would all do it.

Does glaucon agree with Socrates?

With Glaucon and Adeimantus is agreement with Socrates in how they will begin their search for justice, Socrates introduces the origin of the city. Each man, he says, is unable to provide for all of his needs and therefore requires the assistance that can only be provided by the city.

Who is Socrates talking to in the republic?

Book I. Socrates and Glaucon visit the Piraeus to attend a festival in honor of the Thracian goddess Bendis (327a). They are led to Polemarchus’ house (328b). Socrates speaks to Cephalus about old age, the benefits of being wealthy, and justice (328e-331d).