Abstract

Even though the first book of the Republic ends with the claim that the definition of justice has not been determined, a careful analysis of the details of Socrates’ arguments with Polemarchus and Thrasymachus yields a definition of justice. Polemarchus should have defended the understanding of justice as helping friends and harming enemies by saying that, because one can use one’s knowledge either to help or to harm, a just person will choose to use his knowledge of an art either to help his friends or to harm his enemies. Socrates’ art of wage-earning is not really an art at all, but merely amounts to having an ulterior motive for doing what one does. Socrates’ true position will be seen to be that just people use their knowledge for the sake of helping people—not for the sake of acquiring some supposed benefit for themselves in the future.