University Professor of Political Science and International Affairs, George Washington University. Constructivist scholar in international relations specializing in global governance, international organizations, ethics, and social theory. Demonstrated how state interests are defined in the context of internationally held norms and understandings, used theories of organization to explain international institutions, and introduced and extended sociological institutionalist theorizing within the field of international relations. Books include Rules for the World: International Organizations in Global Politics (with Michael Barnett), The Purpose of Intervention: Changing Beliefs about the Use of Force, and National Interests in International Society. Recipient of the Woodrow Wilson Award, American Political Science Association; Best Book Award, International Studies Association; Oscar and Shoshana Trachtenberg Prize for Scholarship, George Washington University; Best Recent Book on the UN System, Academic Council on the UN System (ACUNS).