Violence
Violence is defined by the World Health Organization as "the intentional use of physical force or power, threatened or actual, against oneself, another person, or against a group or community, which either results in or has a high likelihood of resulting in injury, death, psychological harm, maldevelopment, or deprivation," although the group acknowledges that the inclusion of "the use of power" in its definition expands on the conventional understanding of the word. This definition involves intentionality with the committing of the act itself, irrespective of the outcome it produces. However, generally, anything that is excited in an injurious or damaging way may be described as violent even if not meant to be violence (by a person and against a person).
Violence
No matter what someone else has done, it still matters how we treat people. It matters to our humanity that we treat offenders according to standards that we recognize as just. Justice is not revenge — it's deciding for a solution that is oriented towards peace, peace being the harder but more human way of reacting to injury. That is the very basis of the idea of rights.
Judith Butler, The Believer, Interview - Issue 2.