Sonia Lucarelli is Associate Professor of International Relations and Pan-European Security at the University of Bologna and Director of Research at the Forum on the Problems of Peace and War in Florence. Her articles have appeared in the Journal of Common Market Studies, Journal of International Relations and Development, European Security and European Foreign Affairs Review.

James Sperling is Professor of Political Science, University of Akron. His articles have appeared in the British Journal of Political Science, International Affairs, International Organization, Journal of European Public Policy and Review of International Studies.

Mark Webber is Professor of International Politics at the University of Birmingham. His articles have appeared in European Security, European Foreign Affairs Review, International Affairs, International Relations, British Journal of Politics and International Relations, Civil Wars and Review of International Studies.