iI agree however human's have an ingrained need to kill each other. We've been throwing rocks, spears, arrows, bullets, bombs and other imaginative weapons at each other since, well, forever. Peace you say? Name a time when the world had peace. Actually, don't bother because it's never been. Not since humans arrived anyway. we are a pathetic species really. Greedy, narcissistic, egotistical and wasteful.