Book excerpt: From a team of leading experts comes a comprehensive, multidisciplinary examination of the most current research including the complex issue of violence and violent behavior. The handbook examines a range of theoretical, policy, and research issues and provides a comprehensive overview of aggressive and violent behavior. The breadth of coverage is impressive, ranging from research on biological factors related to violence and behavior-genetics to research on terrrorism and the impact of violence in different cultures. The authors examine violence from international cross-cultural perspectives, with chapters that examine both quantitative and qualitative research. They also look at violence at multiple levels: individual, family, neighborhood, cultural, and across multiple perspectives and systems, including treatment, justice, education, and public health.