One could argue that violence is in fact vital for our species survival, just like it is for all species... and that there are different types of violence aswell.

Life is violent, and nature is a violent force and has to be, wether it's diseases, earthquakes or conflicts of all kinds in order to maintain a balance, to the best of its abbilities.

We cannot keep on populating this planet with the current speed, an increase with 4.5 billion people year(s) 1900-2000... maybe just maybe we have evolved into a more violent, and/or nature has evolved this species this way ironically trying to preserve this human species. I don't know... :surprised