Abstract

In this paper, I oppose the now-dominant view that Thrasymachus offers a definition of justice in Book I of the Republic. This way of interpretation Thrasymachus does not pay sufficient attention to the methodological assumptions he makes during his disagreement with Socrates. To better understand Socrates’ antagonist, it is crucial to remember that he was, in fact, a sophist. I argue that what the character Thrasymachus is doing in Book I is importantly akin to a certain genre of sophistic arguments from the 5th century. In his discussion with Socrates, Thrasymachus attempts a genealogical unmasking of justice, which he hopes will change the action-guiding beliefs of his audience. Although my discussion is primarily about the methodology or structure of Thrasymachus’ argument, I conclude by offering a brief discussion of its substance, as well.