The final stage of a public health approach to violence is the implementation of interventions. Four strategies are effective in assessing violence reduction: some significant deterrent effect on some measure of violence, a well-designed study with a suitable comparison group, the effectiveness of the intervention in more than one setting, and indication of positive effects beyond 1 year. The growing body of scientific knowledge about violence suggests some prevention strategies. These include the raising of public awareness about violence, the promotion of economic development, continued research, the involvement of health care professionals, peer-to-peer education and support, questioning of the entitlement to violence, starting at birth to protect children from the causes of violence, development of community alternative to violent activities, countermeasures for contributing factors for violence, weapons policies, and support for victims of violence. The involvement of the private sector in violence prevention is essential. A broad battery of interventions applied in a coordinated manner can reduce violence.