First published in 1981, this volume presents studies on the social psychology of the relations and conflicts between social groups. Henri Tajfel played a central role in the development of social psychology in Europe, both in his own research and in his sponsorship of other European research. He has been particularly influential through his publications on various aspects of inter-group behaviour and a good deal of what he has written remains dispersed in a large number of different publications. This book presents a synthesis of some of this work, edited and structured to demonstrate its continuity and its cumulative importance. The book will be indispensable for social psychologists and should interest a wide range of political and social scientists.