Violence causes more than 1.6 million deaths worldwide every year and is one of the leading causes of death in all parts of the world for persons ages 15-44, according to the World Health Organization. Being maltreated, being in violent interpersonal relationships, experiencing sexual violence, and/or living in violent neighborhoods create stressful and traumatic environments that can negatively affect an otherwise healthy individual. The Institute on Urban Health Research and Practice (IUHRP) conducts research on the etiology, consequences and prevention of multiple types of violence, including youth violence, child maltreatment, community violence, sexual assault, and intimate partner/teen dating violence. Previously, studies of the etiology of youth violence and child maltreatment have identified potentially modifiable features of urban neighborhoods to use in the design of prevention programs, and identified teen behaviors and attitudes to use in prevention of dating and intimate partner violence. Violence prevention studies evaluate interventions and initiatives designed to prevent violence within an urban context, including prevention of teen dating violence among urban youth. IUHRP’s researchers use an ecological perspective to investigate environmental, social and individual determinants of violence in an attempt to better understand its causes and consequences, and to inform prevention efforts. Through this work, IUHRP strives to continually inform interventions that that ameliorate the consequences of the trauma of exposure to violence, as well as prevent interpersonal and community violence from occurring.