I am choosing to disagree with Nathaniel’s assertion that those with which Socrates spoke do not believe in free will. The question of predetermination does not show up anywhere in the Republic. Cephalus believed he could achieve justice by doing good; Polemarchus believed that justice is giving to each what is due; Thrasymachus argued that justice was the will of the powerful. None of these question whether justice is possible; thus free will is a part of their assumption. Glaucon and Adiemantus say that justice could be a natural thing created by man for each person’s own good. Their argument differs from Nathaniel’s argument, justice is impossible because people have no free will, in that people choose to do what is best for themselves.