South Africa has one of the highest rates of violence towards women globally. However, little is known about how to prevent men's use of violence. The Sonke CHANGE Trial tests an intervention that targets men as individuals, groups, and community members in a peri-urban setting in South Africa. Eighteen neighborhoods will be randomly assigned to either the intervention condition or a control group. By speaking to men at baseline, 12 months, and 24 months, investigators will learn whether violence and other health behaviors shift over time. Alongside the trial, qualitative research will explore how the intervention took place and why participants may change attitudes or behaviors.