Violence

This is in response to Austin's blog question "Do you ever think that maybe people will realize that crime and violence isn't the way to go...or do you think that there will always be crime and violence among societies?"
I think that crime and violence will exist as long as people do. Human emotions will not allow for there to be eternal peace. As for violence, some people will kill over jealousy or hate. It happens frequently and will continue to happen. I think the reason this will continue to happen is because not everyone disapproves of the way the world is. Some people think that violence is necessary, and as long as those people exist, so will violence. I think crime exists for very similar reasons. Some people steal because they are jealous, others steal to see if they can get away with it.
Are there times when stealing or violence are acceptable?