And in many ways, we can understand human intellectual history just based on this idea: ? should we accept human nature?

在很多方面，我们能理解人类智力发展历史,仅仅基于这个观点：,应不应该接受人类本性？

哈佛公开课 - 幸福课课程节选

Here it is not just the venerability of slavery, how old it is, but it's the idea that it has been crucial to the development of all great civilizations.

不仅仅讨论奴隶制的庄严性与历史由来,更是它曾经对人类文明的发展,起过至关重要的作用

耶鲁公开课 - 美国内战与重建课程节选