You always have to get worried in history when people start talking about how human beings or human behavior is rooted in nature.

当你了解那段历史中的人们在讨论,某些人类或者人类行为是天性使然时,你会为此担忧

耶鲁公开课 - 美国内战与重建课程节选

This is the natural condition, the state of nature, the state of war that Hobbes attributes to, again, the fundamental fact of human nature.

这是自然的状态，霍布斯把战争状态归因于，人类的基本天性。

耶鲁公开课 - 政治哲学导论课程节选