The story of evolution, we have been told, is the story of the survival of the fittest. The strong eat the weak. The creatures that adapt to the environment pass on their selfish genes. Those that do not become extinct. In this telling, we humans are like all other animals — deeply and thoroughly selfish. We spend our time trying to maximise our outcomes — competing for status, wealth and mating opportunities. Behaviour that seems altruistic is really self-interest in disguise. Charity and fellowship are the cultural drapery atop the iron logic of nature.