JoJo said:
If someone doesn't die from violence, they'll die from something-else... later. Later is the important part, less murders means a longer lifespan for the potential victims, which most people would consider a good thing. If you're looking for objectivity you won't find it here, morality is all based on subjective values. My argument is that a non-violent world would lead to greater happiness on average and that most people value happiness as a good thing.
Incidentally, I don't see death by violence from humans as any more 'natural' than death by illness (violence by microorganisms, or your own body turned against you) or death by accident, they're all equally death and all equally preferably minimized whenever possible, at-least from my point of view. But anyhow, naturalness is a subjective value and not a particularly attractive one in my opinion, I don't really see how something happening in the natural world gives that thing some kind of inherent value. I mean rape, cannibalism, inter-species mating etc are all very common in the natural world and you won't see many fans of natural products advocating those ;-)
True enough, and I am not suggesting that I think everyone should go out and start killing people until there are none of us left. Just that I don't think there should be a systematic effort to end all violence completely.
Sometimes violence is appropriate. Sometimes a violent death is a good death. Sometimes getting punched in the face is actually the best result for both people. Certainly not always, but nevertheless I believe that those statements are sometimes true.
Incidentally I am not sure that happiness is really ever increased by that sort of thing. There seems to be a lot of depression and anxiety in our modern, less-violent society. Quite possibly more than there used to be, though I certainly wouldn't suggest that I think that is directly linked to less violence.
What I do think is that sometimes violence seems to be the most natural and appropriate response to certain stimuli, and to act otherwise seems distinctly unnatural. Humans are animals capable of reasoning and logic. I think we should embrace all aspects of who we are. Just as it's important to be physically healthy and to exercise, it's important to use your mind, your creativity, and exercise your reason. Sometimes it's best to restrain yourself, and sometimes it's best to hit someone. Any philosophy that disregards some aspect what humans are has always seemed inherently disordered to me.
Anyhoo, I like talking this sort of thing out with other people: it helps put my own feelings, opinions, and reasoning into a clearer frame.