Peter Liberman teaches courses in security studies and international politics. He is currently working on a book on retribution in public support for state violence (including the use of military force and torture) and in political decision-making. He has published articles on this subject in International Organization, Journal of Conflict Resolution, Public Opinion Quarterly, and Personality and Social Psychology Bulletin. His earlier research has addressed nuclear proliferation and the political economy of security, including a book on military occupations, Does Conquest Pay? The Exploitation of Occupied Industrial Societies (Princeton, 1996). His work has been supported by the National Science Foundation, Time Sharing Experiments in the Social Sciences, the Carnegie Corporation, and other foundations. An affiliate of the Saltzman Institute of War & Peace Studies at Columbia University, Liberman also serves as an Associate Editor of International Security and as a member of the Editorial Board of Security Studies.