Violence is a complex behavior that manifests itself every day in acts of terrorism, through exposure in the media, and in our families and neighborhoods. Understanding the origins of violent behavior and aggression, its developmental course, and its impact on individuals and societies will allow us to develop appropriate preventative interventions and policies that will affect us in our everyday lives. This handbook is unique in its depth of coverage of violence and aggressive behavior, its multidisciplinary focus, and its presentation of cutting-edge research by the leading authors in the field.