Eli Whitney

On December 8, 1765, in Westborough, Massachusetts, Eli Whitney was born into a farming family that encouraged mechanical experimentation. He graduated from Yale College in 1792 and soon traveled south intending to study law, but employment on a Georgia plantation brought him into contact with the bottleneck in cotton processing. That setting produced the invention that made him famous.

Whitney devised the cotton gin in 1793, a machine that sharply increased the speed at which short-staple cotton could be cleaned for market. He later turned to federal arms contracts and manufacturing methods associated with interchangeable parts while supplying muskets to the government from New Haven. Together, those ventures linked plantation expansion, national markets, and early industrial production.

Whitney's cotton gin accelerated the spread of slavery into the Deep South and helped make cotton central to the national and Atlantic economy. His manufacturing work also influenced later federal armories and the industrial techniques that underpinned nineteenth-century mass production.