David Wong said this quote
“ Our little tribal circles, bound by social contracts and selfish mutual need. Everyone working in their own greedy self-interests and huddling together with their tribe, at war with all those outside who they regard as barely human. What breaks a human mind out of that iron cage of mistrust, is a sacrifice. The martyr who gives up everything, who abandons all personal gain, who lays down his life for the good of those outside his group. He becomes a symbol all can rally around. So instead of trying to make a selfish, violent primate somehow empathize with the whole world, which is impossible, you only need to get him to remember and love the martyr. As one is forgotten, another must replace it. ”