  Morgenthau himself reinforces the belief in the human drive for power by introducing a normative aspect of his theory, which is rationality. A rational foreign policy is considered “to be a good foreign policy” (7). But he defines rationality as a process of calculating the costs and benefits of all alternative policies in order to determine their relative utility, i.e. their ability to maximize power. Statesmen “think and act in terms of interest defined as power” (5). Only intellectual weakness of policy makers can result in foreign policies that deviate from a rational course aimed at minimizing risks and maximizing benefits. Hence, rather than presenting an actual portrait of human affairs, Morgenthau emphasizes the pursuit of power and the rationality of this pursuit, and sets it up as a norm.