In 1996, the World Health Assembly adopted Resolution WHA49.25 which declared violence "a leading worldwide public health problem" and requested that the World Health Organization (WHO) initiate public health activities to (1) document and characterize the burden of violence, (2) assess the effectiveness of programmes, with particular attention to women and children and community-based initiatives, and (3) promote activities to tackle the problem at the international and national levels. The World Health Organizations initial response to this resolution was to create the Department of Violence and Injury Prevention and Disability and to publish the World report on violence and health (2002).The case for the public health sector addressing interpersonal violence rests on four main arguments. First, the significant amount of time health care professionals dedicate to caring for victims and perpetrators of violence has made them familiar with the problem and has led many, particularly in emergency departments, to mobilize to address it. The information, resources, and infrastructures the health care sector has at its disposal are an important asset for research and prevention work. Second, the magnitude of the problem and its potentially severe lifelong consequences and high costs to individuals and wider society call for population-level interventions typical of the public health approach.
Neurobiologist Jan Vodka emphasizes that, for those purposes, "violent behavior is defined as overt and intentional physically aggressive behavior against another person. "Based on the idea of human nature, scientists do agree violence is inherent in humans. Among prehistoric humans, there is archaeological evidence for both contentions of violence and peacefulness as primary characteristics.Since violence is a matter of perception as well as a measurable phenomenon, psychologists have found variability in whether people perceive certain physical acts as "violent". For example, in a state where execution is a legalized punishment we do not typically perceive the executioner as "violent", though we may talk, in a more metaphorical way, of the state acting violently. Likewise, understandings of violence are linked to a perceived aggressor-victim relationship: hence psychologists have shown that people may not recognise defensive use of force as violent, even in cases where the amount of force used is significantly greater than in the original aggression.The concept of violence normalization is known as socially sanctioned, or structural violence and is a topic of increasing interest to researchers trying to understand violent behavior. It has been discussed at length by researchers in sociology, medical anthropology, psychology, psychiatry, philosophy, and bioarchaeology.Evolutionary psychology offers several explanations for human violence in various contexts, such as sexual jealousy in humans, child abuse, and homicide. Goetz (2010) argues that humans are similar to most mammal species and use violence in specific situations.