  (1) Human nature is a starting point for classical political realism. Realists view human beings as inherently egoistic and self-interested to the extent that self-interest overcomes moral principles. At the debate in Sparta, described in Book I of Thucydides’ History, the Athenians affirm the priority of self-interest over morality. They say that considerations of right and wrong have “never turned people aside from the opportunities of aggrandizement offered by superior strength” (chap. 1 par. 76).