undeniably

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.

毫问,利他主义存在于任何社会,而且道德准也普遍提倡利他主义或善良行为,而谴责利。这也正是利他主义具有强大生命力的原因。