麻省, 豪宅,棉花,铁路,运河 significant impact on American history
Eli Whitney's invention of the cotton gin in 1793 enabled cotton seeds to be removed 50 times faster, a breakthrough which led the country to become home to 75% of the world's cotton supply.[3] This caused the demand for slaves to increase rapidly, with Yale law professor Paul Finkleman writing that "slaves were a profitable investment before the cotton gin and an even more profitable investment after its invention".[4]
Upon taking office as U.S. Secretary of the Navy in 1885, William Collins Whitney oversaw the American fleet's widespread adoption of steel ships, an event essential to the United States becoming a leading world power.