Originally Posted by tooge
Actually, it's being altruistic, rather than just "nice". Like the honeybees. They off themselves while protecting the hive, but in the long run, they are passing on "like" genetics.
Yeah, it's the Kin selection hypothesis of evolutionary biology.
I had a long response typed out on why I don't think it holds much weight in humans, but decided against posting it because it's not that big of a deal.
Suffice it to say that our ability to make complex decisions and our cognitive malleability at an early age can add some seemingly unanswerable questions for the theory.