> I've wondered where that comes from, nature or nurture. And how common it is. Altruism is deeply embedded in all men, because it raises our chances of securi

> I've wondered where that comes from, nature or nurture. And how common it is. Altruism is deeply embedded in all men, because it raises our chances of securing a mate. Nurture probably has some degree of an effect, but it's one of the most basal instincts.