The most altruistic behavior of all, giving your life to help another, can be explained in cold-blooded evolutionary terms.

最利他的行为，就是为他人牺牲自己，这也可以用毫无人情味的进化论来解释。

耶鲁公开课 - 心理学导论课程节选

And I want to focus particularly on emotions that generate kind or altruistic behavior.

我想特别讲解能让人产生善意,利他主义行为的情感。

耶鲁公开课 - 心理学导论课程节选

This gives rise to some emotion including emotions that could be viewed as moral emotions, like guilt and anger, and again, grounds altruistic behavior in an evolutionary perspective.

这就产生了情绪,包括被视为道德情绪的情绪，例如内疚和愤怒，再一次，这种对利他行为的解释,也是从进化论的角度出发的。

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