They don't. The question as originally asked also includes this quote: “Darwinian explanations for such things are often too supple: Natural selection makes humans self-centered and aggressive—except when it makes them altruistic and peaceable. Or natural selection produces virile men who eagerly spread their seed—except when it prefers men who are faithful protectors and providers." However, altruism and protection of offspring confer advantages. Faithful protection ensures that the young have a higher chance of survival. | They don't. The question as originally asked also includes this quote: “Darwinian explanations for such things are often too supple: Natural selection makes humans self-centered and aggressive—except when it makes them altruistic and peaceable. Or natural selection produces virile men who eagerly spread their seed—except when it prefers men who are faithful protectors and providers." However, altruism and protection of offspring confer advantages. Faithful protection ensures that the young have a higher chance of survival. |