In 1860 slaves as an asset were worth more than all of America's manufacturing, all of the railroads, all of the productive capacity of the United States put together.

860年,奴隶作为财产的产值超过了,美国所有的制造业,所有的铁路,和所有产业的产值总和

耶鲁公开课 - 美国内战与重建课程节选