Peter Coleman is an assistant professor of Psychology and Education at Teachers College, Columbia University, and Director of the International Center for Cooperation and Conflict Resolution at Columbia. Dr. Coleman has conducted research on social entitivity processes (ingroup/outgroup formation), gender discrimination in organizations, the mediation of inter-ethnic conflict, ripeness in intractable conflict, conflict resolution and difference, and the conditions which foster the constructive use of social power. He recently co-edited a book entitled, The Handbook of Conflict Resolution: Theory and Practice (2000), published by Jossey-Bass, in which he also authored a chapter on intractable conflicts. He has numerous other publications in the area of intergroup conflict, as well.