Caring, it's only natural.

The possibility that empathy is part of our primate heritage ought to please us, but we are not in the habit of embracing our nature. When people kill each other, we call them "animals," but when they give to the poor, we praise them for being "humane." The idea that our animal background is all bad is one of the reasons a country well-known for its optimism [US] refuses to embrace Darwinism. Yet it will be hard to identify anything we like about ourselves that is not part of our evolutionary background. What we need is a vision of human nature that encompasses all of our tendencies: the good, the bad and the ugly.

- Frans de Waal