Gregory M. Reichberg is Research Professor at the Peace Research Institute Oslo (PRIO). He is leader of the Oslo-based Research School in Peace and Conflict, adjunct Professor in the Department of Political Science at the University of Oslo, associate editor of the Journal of Military Ethics, and board member of the US-based Peace Research Endowment. He is co-editor of World Religions and Norms of War (2009); Ethics, Nationalism, and Just War: Medieval and Contemporary Perspectives (2007); and The Ethics of War: Classic and Contemporary Readings (2006).