While his statemnt is partially true, it ignores a lot too. The North used a shit ton of cotton from the South for their factories (also in my quotes above). Here is one to stare you in the face; https://www.asme.org/engineering-topics/articles/history-of-mechanical-engineering/how-the-cotton-gin-started-the-civil-war Before the cotton gin, slavery had been on its way out-farmers realized it was more expensive to maintain slaves, compared to the value of what they could produce. Cotton was a troublesome crop anyway; its fiber could only be separated from the sticky, embedded seeds by hand, a grueling and exhausting process. This changed dramatically, of course, with the advent of the cotton gin. Suddenly cotton became a lucrative crop and a major export for the South. However, because of this increased demand, many more slaves were needed to grow cotton and harvest the fields. Slave ownership became a fiery national issue and eventually led to the Civil War.