The best mechanisms to prevent violence against women were reviewed in a critical appraisal conducted by the University Health Network Women's Health Program. Several promising primary interventions were identified. These included: educational and policy-related interventions to change social norms, early identification of abuse by health and other professionals, programs and strategies to empower women, safety and supportive resources for victims of abuse, and improved laws and access to the criminal justice system. The policy recommendations emerging from this analysis are presented.