Why were southern plantations able to increase their cotton production between 1790 an 1821?

Southern plantations increased their cotton production between 1790 and 1821 primarily due to the invention of the cotton gin in 1793, which significantly streamlined the process of separating cotton fibers from seeds. This innovation made cotton cultivation more profitable and efficient. Additionally, the expansion of fertile land in the Deep South and the growing demand for cotton in both domestic and international markets fueled the increase in production. The use of enslaved labor also played a crucial role in supporting this agricultural boom.