Answer:
Between 1800 and 1820, the African slave population in America practically doubled, from about 70,000 in 1800 to about 130,000 in the early 1820s. This was produced by the combination of a series of socioeconomic factors that made necessary an increase in agricultural and livestock production in the south of the nation.
On the one hand, the independence of the United States as a free nation caused the trade restrictions imposed by Great Britain to be lifted, with which the country went out to attract new markets to which to sell its products, with which a greater production was needed and, therefore, more labor too.
On the other hand, the War of 1812 against Great Britain made America close productively, seeking to develop as a self-sufficient nation, which required greater production to satisfy the domestic demand for agricultural and industrial goods, for which it was also needed increased manpower.
