With the invention of the cotton gin, cotton became the cash crop of the Deep South, stimulating increased demand for enslaved people from the Upper South to toil the land.
As the disparity between plantation owners and poor white people widened in the Deep South, deeply entrenched racism blurred perceived class divides.
The slave economy of the South had international economic reach since the majority of cotton was sold abroad; it connected the United States to the international marketplace.
By the mid-19th century, southern commercial centers like New Orleans had become home to the greatest concentration of wealth in the United States. Slavery shaped the culture and society of the South, which rested on a racial ideology of white supremacy. And importantly, many whites believed slavery itself sustained the newly prosperous Southern economy.
However, cotton was a labor-intensive crop, and many plantation owners were reducing the number of people they enslaved due to high costs and low output. In 1793, Eli Whitney revolutionized cotton production when he invented the cotton gin, a device that separated the seeds from raw cotton. Suddenly, a process that was extraordinarily labor-intensive could be completed quickly and easily. By the early 1800s, cotton emerged as the South’s major cash crop—a good produced for commercial value instead of for use by the owner. Cotton quickly eclipsed tobacco, rice, and sugar in economic importance.
With the cotton boom in the Deep South came a spike in demand for enslaved laborers to work the fields. Although Congress abolished the foreign slave trade in 1808, Americans continued to smuggle Africans across the Atlantic Ocean. However, the domestic slave trade primarily supplied the necessary labor force. As the tobacco crop dwindled, former tobacco farmers in the older states of Virginia and Maryland found themselves with “surplus” enslaved laborers whom they were obligated to feed, clothe, and shelter. Some slaveholders responded to this situation by freeing enslaved laborers; far more decided to sell them.