Postinternational theory in international relations (IR) theory offers an alternative to the state-centric perspectives on the world that have dominated IR theory. A state-centric approach is far too restrictive. Despite the resurgence of populist nationalism, contemporary scholars are much more aware than in the past of the enormous variety of states, the important distinction between state and nation, the fact that states, even at the policy-making level, are not unitary actors, and the recurring possibility that violence will be intrastate or trans-state rather than interstate. It is apparent, too, that the stage of global politics is crowded by countless actors of different types, whose complex interactions substantially determine the intermediate and longer-range scenes in particular dramas. Moreover, the flow of events significantly reflects not only such ideational factors as competing identities, ideologies, and mental spaces, but also the pace and volume of globalization in its multiple dimensions and related localization dynamics that include resistance to globalization. Postinternational theory embodies the foregoing worldview. It shares some areas of agreement with leading schools of IR theory, but provides a much better foundation for future theory building as well as a policy-relevant way of thinking about the world and analyzing global political issues.