You have a very, very changing demographic situation in the American South and its political culture has to respond to that.

你可以想象,当时的美国南方,人口流动是非常厉害的,所以当时的政治文化必须做出相应的调整

耶鲁公开课 - 美国内战与重建课程节选

Every day the latter grows more wealthy and densely populated while the South is stationary and growing poor."

北方每天都在变得更富裕,人口也越来越多,而南方,毫无进步,变得越来越贫困"

耶鲁公开课 - 美国内战与重建课程节选