The document discusses the causes and types of violence. It analyzes violence through four levels - biological/personal, close relationships, community, and societal. Violence is categorized into self-directed, interpersonal, and collective forms. The types of violence include physical, sexual, emotional, psychological, spiritual, and cultural forms. The document concludes that scientific strategies aimed at underlying causes, such as parenting programs, life skills training, and reducing substance abuse, have been effective in preventing violence.