The Cotton Gin

Eli Whitney's cotton gin, patented in 1793, was a simple machine with enormous consequences. It mechanized the removal of seeds from short-staple cotton — a task so slow by hand that the crop was barely profitable — and made it possible to clean fifty times as much cotton in a day. In doing so it transformed the American economy and the course of its history.

The effect on the South was immediate and vast. Short-staple cotton could now be grown across the upland South and sold at huge profit, and the region rushed to plant it. Cotton became the nation's leading export and the raw material that fed the textile mills of New England and Britain.

But the machine carried a terrible irony. By making cotton wildly profitable, the gin made enslaved labor more valuable than ever, reversing a gradual decline in slavery and binding the South ever more tightly to it. The enslaved population grew rapidly as planters expanded westward in search of new cotton land.

Whitney, who had imagined his device might ease the burden of labor, instead helped fasten slavery onto the nation for another seventy years — and helped set the stage for the Civil War. Few inventions show more starkly how technology can reshape society in ways its creator never intended.