Arthur A. Stein is Professor of Political Science at UCLA, California, USA. He is the author of The Nation at War (1980) and Why Nations Cooperate (1990); and co-editor of The Domestic Bases of Grand Strategy (1993, with Richard N. Rosecrance), and of No More States?: Globalization, National Self-Determination, and Terrorism (2006, with Richard N. Rosecrance). Ayelet Harel-Shalev is Senior Lecturer in the Conflict Management and Resolution Program and the Department of Politics and Government at Ben-Gurion University of the Negev, Israel. Her interests and publications are at the intersection of politics, conflict studies and feminist international relations, and focus mainly on ethnic-conflicts and women in the military.