Violence can be a lot of different things.
We often think about it in relation to wars or gangs but there are many other forms of violence. Self harm and suicide are forms of self-directed violence. Interpersonal violence happens between individuals. It includes domestic, dating or intimate partner violence where one person exerts control over another, other forms of family violence like child maltreatment and also acquaintance or stranger violence; we’d normally include gang violence here.
Collective violence involves violence on a much larger scale and includes wars, genocide and economic violence.
The one thing we do know about violence is that it is preventable.