Cash crops and the plantation system created a demand for slave labor, The transatlantic slave trade was part of triangular trade routes; the Middle Passage from Africa to the colonies led to the death of roughly 1/4 of all kidnapped Africans, The Quakers in Pennsylvania were one of the first abolitionist groups in the colonies., The importation of slaves from Africa was outlawed in the U.S. in 1807, the invention of the cotton gin led to an increase in demand for slave labor , Frederick Douglass, a former slave, was a well-known abolitionist speaker/writer; published the North Star , a novel by Harriet Beecher Stowe spread awareness of the evils of slavery; convinced many to join the abolition movement, Harriet Tubman was the most successful "conductor" of the Underground Railroad, The Dred Scott decision declared that blacks were property, not citizens, and had no legal rights, The Underground Railroad was a series of secret routes to help enslaved blacks escape, Southern Colonies built their economy around the plantation system and the labor of enslaved Africans.

Slavery and early Abolition in the U.S.

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