Nils Petter Gleditsch International Peace Research Institute, Oslo (PRIO) & Department of Sociology and Political Science, Norwegian University of Science and Technology, Trond heim This book could hardly have happened but for the end of the Cold War. The decline of the East-West conflict has opened up the arena for increased attention to other lines of conflict, in Europe and at the global level. Environmental disruption, not a new phenomenon by any means, is a chief beneficiary of the shift in priorities in the public debate. The Scientific and Environmental Affairs Divi sion of NATO has moved with the times and has defined environmental security as one of its priority areas for cooperation with Central and Eastern Europe and countries of the former Soviet Union. This book is the main output of an Advanced Research Workshop (ARW), held in Bolkesjl/l, Norway, 12-16 June 1996. I would like to acknowledge the personal support of L. Veiga da Cunha, Director of the Priority Area on Environmental Security. Research on these issues is now very much a collaborative effort across former lines of division in Europe. NATO encourages, indeed requires, that this be reflected in the composition of the participants, as well as the organizing committee. This meeting was organized by a group of five people from five different countries: Lothar Brock (Germany), Nils Petter Gleditsch (Norway), Thomas Homer-Dixon (Canada), Renat Perelet (Co-Director, Russia), and Evan Vlachos (USA)."

The history of war is also a history of its justification. The contributions to this book argue that the justification of war rarely happens as empty propaganda. While it is directed at mobilizing support and reducing resistance, it is not purely instrumental. Rather, the justification of force is part of an incessant struggle over what is to count as justifiable behaviour in a given historical constellation of power, interests, and norms. This way, the justification of specific wars interacts with international order as a normative frame of reference for dealing with conflict. The justification of war shapes this order, and is being shaped by it. As the justification of specific wars entails a critique of war in general, the use of force in international relations has always been accompanied by political and scholarly discourses on its appropriateness. In much of the pertinent literature the dominating focus is on theoretical or conceptual debates as a mirror of how international normative orders evolve. In contrast, the focus of the present volume is on theory and political practice as sources for the re- and de-construction of the way in which the justification of war and international order interact. With contributions from international law, history, and international relations, and from Western and non-Western perspectives, this book offers a unique collection of papers exploring the continuities and changes in war discourses as they respond to and shape normative orders from early modern times to the present.