A normative theory neither grounded in nor constrained by a plausible positive science is not compelling. Thus, for example, a normative theory of the state which sees an end to class conflict (e.g. Plato's) is obviously not compelling to those who accept as valid a positive science of politics which claims permanence for class conflict (e.g. Aristotle's). 1 In this instance, the normative theory would appear utopian to one who accepts the explanatory argument. This paper argues that (orthodox) normative economic theories of politics (NETP) are in many respects utopian because they are inadequately constrained by a plausible science of politics. Part I outlines the basic components of NETP; Part II then contrasts the “positive science” implicitly underlying NETP with the main ingredients of a more compelling alternative and uses the latter to criticize NETP; Part III discusses some issues raised by the above and suggests directions for a new (and better) normative theory of politics.