This volume provides a comprehensive overview of classic and contemporary issues in the field of group processes. Chapters are written by internationally known experts who have made major theoretical and empirical contributions to the study of groups. The broad and up-to-date coverage of the book makes it an essential resource for advanced undergraduates, graduate students, researchers, and practitioners. The volume will be of interest to scholars in various disciplines, including social and organizational psychology, sociology, communication, economics, and political science.