Thrasymachus’ position on justice, as articulated in Book I of Plato’s Republic, has emerged in the literature as a frustratingly intractable problem because it seems to be made up of contradictory accounts. This paper accomplishes three objectives in relation to this problem. First, it offers an original solution, ‘the relativity view’, which reads Thrasymachus’ two speeches as a temporal narrative, thereby explaining away the notorious contradiction. Second, it highlights the little-noted and underappreciated relativistic and perspectival understandings of justice in Thrasymachus’ (...) account in order to demonstrate where the dominant positions in the literature have gone wrong. Finally, it connects the ‘relativity view’ to the Republic as a whole, a surprising deficiency in most of the literature, which gestures to a deeper understanding of the connections between Book I and the rest of the Republic. (shrink)