Is urban violence a health crisis? According to Chicago epidemiologist and the founder of Cure Violence, Gary Slutkin, violence can be treated using the same methods physicians use to successfully stop an epidemic. Health tools—tracking hot spots, identifying the symptoms and interrupting the disease’s path, changing individual behavior and community norms—are applied to successfully stop and prevent urban violence. Slutkin’s highly trained health workers are called ‘violence interrupters,’ and they are changing the way communities face the challenges of violence and crime on their streets. As the world’s population continues to rise, can treating violence as a disease be the prescription for a safe and vibrant society? And how can we use the scientific methods of disease control to eradicate the spread of violence?