Stephen M. Walt is Academic Dean at the John F. Kennedy School of Government at Harvard University, where he holds the Robert and Renée Belfer Professorship in International Affairs. He previously taught at Princeton University and the University of Chicago, where he served as Master of the Social Science Collegiate Division and Deputy Dean of Social Sciences. He has been a Resident Associate of the Carnegie Endowment for Peace and a Guest Scholar at the Brookings Institution, and a consultant for the Institute of Defense Analyses, the Center for Naval Analyses, and the National Defense University. He serves on the editorial boards of Foreign Policy, Security Studies, International Relations, and Journal of Cold War Studies, and as Co-Editor of the Cornell Studies in Security Affairs, published by Cornell University Press. He was elected a Fellow in the American Academy of Arts and Sciences in May 2005. Professor Walt is the author of The Origins of Alliances (1987), which received the 1988 Edgar S. Furniss National Security Book Award, and Revolution and War (1996). His recent publications include "An Unnecessary War," Foreign Policy, (Winter 2002-03), "American Hegemony: Its Prospects and Pitfalls," Naval War College Review, (Spring 2002); "Beyond bin Laden: Reshaping U.S. Foreign Policy" (International Security, Winter 2001/02); and the forthcoming Taming American Power: The Global Response to U.S. Primacy (W.W. Norton, 2005).