Morton Deutsch is one of the most distinguished psychologists of our time and has been honoured by his profession with numerous awards. His ideas permeate the boundaries of law, international politics, education, business and industrial relations. Yet today many people working in mediation and conflict resolution remain unaware of his great contributions to social and organisational psychology. His professional life spans the very existence of modern social psychology, beginning with his student days in the New York of 1935, through to his continuing work at the International Center for Cooperation and Conflict Resolution, the influential research and teaching centre he founded.