Write the consequences of the slave trade in Liberia.

In the late eighteenth to early nineteenth centuries the free African American population in the Southern states increased to more than one tenth of the total African American population in the country. Some slaveholders considered the presence of free blacks a threat to white domination and suggested sending freed slaves back to Africa. They founded the American Colonization Society in 1816 with the support of some abolitionists, many of whom were Quakers or Evangelicals.
Britain prohibited the slave trade in 1807. When the British Navy apprehended illegal slaving ships the British authorities freed the slaves and settled them in Sierra Leone. In 1816 Paul Cuffee, an abolitionist ship owner of mixed-race origin brought a small group of African Americans to Sierra Leone. This action created a precedent and paved the way for the subsequent colonization of neighboring Pepper Coast (modern-day Liberia). In 1822 the first small party of African American settlers arrived on the Pepper Coast, where the American Colonization Society acquired some land and founded a new settlement that would eventually become Liberia. By the 1840s there were about three thousand African American settlers in Liberia. In 1847 they proclaimed Liberia an independent country. Their descendants, known as Americo-Liberians, ruled Liberia until 1980.