This chapter presents an overview of violence in its different forms, its impact, and opportunities for preventing violence, but with a particular emphasis on the role of the mental health practitioner. Public health aims to make a population-wide impact on a health problem. The ecological model has been utilized effectively by the World Health Organization (WHO) to categorize risk and protective factors and plan interventions for health issues, including violence prevention. Disability-adjusted life years (DALYs) attempt to depict the impact of a disease process or injury type on a population by quantifying the number of healthy life years lost to a certain cause. The impact of the combined violence figures would bring the ranking up to sixth, just behind HIV/AIDS. Thus, violence makes a considerable impact on global health, and in addition there are many hidden implications of injuries due to violence.