Abstract
In this paper I try to explore Plato’s concept of power in the first book of the Republic as opposed to Thrasymachus’. I argue that the core of Thrasy-machus’ position is not to be found in his definitions of justice, but in his con-cept of power and, in this sense, he has a coherent philosophical position. I also claim that although Plato does not explicitly develop a concept of power, it is possible to find it in his arguments throughout the dialogue. Moreover, the link Plato establishes between power and knowledge is going to play a big role in the entirety of his political philosophy.