What do we know about violence? In 2010, four disciplines accounted for most academic output on violence (psychology, psychiatry, public health, and criminology). This was not always the case - in 1970, the field was dominated by legal studies and social science. Understanding the shape of these changes is necessary to assessing what we know about violence. We have some idea of how individual disciplines have studied the subject, but we lack an overview of the connections between these approaches and how they have changed over time. This study aims to map the violence research domain over the last 50 years using citation, bibliometric, and content analysis. The research will identify areas of interdisciplinary information exchange and offer suggestions for future collaboration among violence researchers.