Robert O. Keohane is professor of public and international affairs, emeritus, at Princeton University’s Woodrow Wilson School of Public and International Affairs. He is the author of After Hegemony: Cooperation and Discord in the World Political Economy (1984) and Power and Governance in a Partially Globalized World (2002). He is coauthor (with Joseph S. Nye Jr.) of Power and Interdependence (3rd ed., 2001) and (with Gary King and Sidney Verba) of Designing Social Inquiry (1994). In 2016 he was awarded the Balzan Prize for International Relations: History and Theory. (Author photograph by Sameer Khan)