Stephen G. Walker is Professor Emeritus of Political Science in the School of Politics and Global Studies and Affiliated Faculty in the Future Security Initiative program at Arizona State University. He has published Role Theory and Foreign Policy Analysis (1987), Beliefs and Leadership in World Politics (2006), Rethinking Foreign Policy Analysis (2011), U.S. Presidents and Foreign Policy Mistakes (2011), Role Theory and the Cognitive Architecture of British Appeasement Decisions (2013), Role Theory and Role Conflict in U.S.-Iran Relations (2017), Operational Code Analysis and Foreign Policy Roles (2021) plus articles in several journals, including World Politics, the Journal of Conflict Resolution, the Journal of Peace Research, International Studies Quarterly, International Interactions, Foreign Policy Analysis, and Political Psychology. The National Science Foundation (1982-1983) funded his research on the belief systems and conflict management strategies of political leaders. He served as a coeditor of International Studies Quarterly (1985) and as a vice-president of the International Society of Political Psychology (1997-1999) and the International Studies Association (2003-2004). He received the Distinguished Scholar Award from the Foreign Policy Section of the International Studies Association in 2003. His recent public service includes serving at the National Academies of Science in 2013-2014 on the National Research Council's Committee on US Air Force Strategic Deterrence Military Capabilities in the 21st Century Security Environment.