What are the costs of violence?

This article presents estimates of the global cost of collective and interpersonal violence for the period of one year. This includes war, terrorism, homicides, assaults and domestic violence against women and children. The cost of conventionally defined interpersonal violence, that is, homicides and assault, are about 7.5 times higher than the cost due to war and terrorism. I also estimate the costs of non-fatal domestic violence against children and women and suggest that these costs are much higher than the combined costs of homicide, assault, terrorism and war. The main reason is that the prevalence of these types of violence is very high: possibly as many as 16 per cent of all children are punished using violent methods and about 12 per cent of all women experience intimate partner violence. Richer societies have lower levels of violence, and there is evidence that prevalence rates have been declining over time. However, it is often unclear why this is the case. Much of the evidence from violence reducing interventions comes from high-income countries, and it is uncertain whether these programs would be similarly effective in low- and middle-income countries. However, although further research is needed to examine the effectiveness of violence-reducing interventions, it appears likely that some interventions would constitute a very effective use of resources.