Book excerpt: This new volume is the first to bring together social and organizational psychologists to explore social identity theory in organizational contexts. The chapters are wide ranging - they deal with basic social identity theory, organizational diversity, leadership, employee turnover, mergers and acquisitions, organizational identification, cooperation and trust in organizations, commitment and work, and socialization and influence within organizations. This book is an integrative platform for a closer relationship between social psychologists and organizational psychologists who study social identity processes in organizations.