The definition of human nature plays a very important role in Thucydides’ account of the Peloponnesian War. The investigation of this concept is basic and complex, subjective and objective, and is undertaken by the author in terms of the rise of democracy and the individual’s intrinsic need for power. According to Thucydides, both of these conflicting ideas stem from this idea of human nature, namely, the inherent goal of the human being is to follow