Any era of great change, great ferment, usually causes reform, anxiety, people who get worried, want to change things.

任何一个大变革的时代,大的动乱,通常会导致改革和焦虑,人们变得担忧,想要改变局面

耶鲁公开课 - 美国内战与重建课程节选

The rise of the polis is based upon critical, economic, military,social,and political changes, all of which produce a world that's really strikingly different from the one that was just before it.

城邦的兴起是基于关键方面,经济,军事,社会 和政治的变革,所有的一切都造就了一个,与之前的时代截然不同的新世界

耶鲁公开课 - 古希腊历史简介课程节选