Book excerpt: This book explores the role of aggression in primate social systems and its implications for human behavior. Many people look to primate studies to see if and how we might be able to predict violent behavior in humans, or ultimately to control war. Of particular interest in the study of primate aggression are questions such as: how do primates use aggression to maintain social organization; what are the costs of aggression; why do some primates avoid aggressive behavior altogether. Students and researchers in primatology, behavioral biology, anthropology, and psychology will read with interest as the editors and contributors to this book address these and other basic research questions about aggression. They bring new information to the topic as well as an integrated view of aggression that combines important evolutionary considerations with developmental, sociological and cultural perspectives.