I think that's gut-level, hard-wired, evolved to solve prisoner's dilemmas.

这种感觉是根深蒂固的，经过进化而来的，帮我们解决囚徒困境的。

耶鲁公开课 - 心理学导论课程节选

Hence, selfish genes will lead to altruistic animals because, to the extent that evolution operates at the level of the genes, there's no hard and fast distinction between your own body and someone else's body.

所以，自私基因会导致利他行为，从这个意义上说,进化在基因层面进行，你自己的身体和别人的身体,没有严格差别。

耶鲁公开课 - 心理学导论课程节选