Moral Order/World Order argues for the centrality of normative theory in the study of international relations. Two themes develop, each reflecting opposing pairs: fact/value, is/ought, description/prescription, feasibility/desirability. The first theme concerns the epistemological framework provided by a normative account. The second theme concerns the political conditions of knowledge which determine the role of different theories, indicating the need for adaptation of traditional normative scholarship, overcoming the separation of ethics from politics which has so far limited its role.