I think you have to consider, where we come from. The idea that the "Fittest survive" is in our gene, our brain and in our heart. In nature violence means strenght and power. This is true for most animals. We are no animals anymore, but there is still something in us, what represents our past. We dont need it anymore, but its there. Nowadays we call that "Evil". And it is evil. We have to overcome it . We need cooperation instead of showing the dark side to each other. Hope we will succeed. Sorry for my poor English and greetings from Germany!