20.The strength of altruism lies in the fact that altruistic acts undeniably occur in any society and that moral codes universally advocate altruism or benevolence and condemn selfishness.
毫无疑问,利他主义存在于任何社会,而且道德准
普遍提倡利他主义或善良行为,而谴责自私自利。这
正是利他主义具有强大生命力的原因。