The second edition of this textbook provides a thoroughly revised, updated and expanded overview of social psychological research on aggression. The first part of the book covers the definition and measurement of aggression, presents major theories and examines the development of aggression. It also covers the role of situational factors in eliciting aggression, and the impact of using violent media. The second part of the book focuses on specific forms and manifestations of aggression. It includes chapters on aggression in everyday life, sexual aggression and domestic violence against children, intimate partners and elders. There are two new chapters in this part addressing intergroup aggression and terrorism. The concluding chapter explores strategies for reducing and preventing aggression. The book will be essential reading for students and researchers in psychology and related disciplines. It will also be of interest to practitioners working with aggressive individuals and groups, and to policy makers dealing with aggression as a social problem.