鸦片战争之后，对中国的鸦片市场英国控制了百分之九十，美国控制了百分之十。哪怕是这百分之十也是一笔巨额财富。美国的波士顿就靠卖中国鸦片换来的钱资助警局、消防站、学校和医院的建设。

另外美国的几个名校尤其是耶鲁大学，很大一部分土地和校园开发都是靠卖中国鸦片的利润建立起来的

https://www.wbur.org/news/2017/07/31/opium-boston-history

https://www.openasia.asia/the-americans-who-made-money-from-opium-and-where-the-profits-went/

Much of the land and the development fund of Yale University, the Low Memorial Library of Columbia University, and Princeton University (three buildings financed by the largest scale donation at the time) also benefited from opium profits.