The cause of the shown trend on the map is: Invention of cotton gin and revival of slavery
What did cotton gin and slavery do for cotton production
The invention of the cotton gin by Eli Whitney in 1793 revolutionized cotton production, automating the separation of cotton fibers from seeds and significantly increasing efficiency. This innovation, coupled with the rising demand for cotton, particularly in the textile industry, led to a surge in cotton cultivation.
To meet the escalating demand for labor in cotton farming, slavery became extensively prevalent, especially in the Southern United States. The combination of the cotton gin's efficiency and the utilization of enslaved laborers propelled the rapid expansion of the cotton industry, making it a dominant and lucrative sector in the 19th-century American economy.