Slavery in the United States Slavery in the United States Slavery in the United States was the legal institution of human chattel enslavement, primarily of Africans and African Americans, that existed in the United States of America in the 18th and 19th centuries. Slavery had been practiced in British America from early colonial days, and was legal in all Thirteen Colonies at the time of the Declaration of Independence in 1776. It lasted in about half the states until 1865, when it was prohibited nationally by the Thirteenth Amendment. As an economic system, slavery was largely replaced by sharecropping. By the time of the American
United States Declaration of Independence colonies. The orthodox British view, dating from the Glorious Revolution of 1688, was that Parliament was the supreme authority throughout the empire, and so, by definition, anything that Parliament did was constitutional. In the colonies, however, the idea had developed that the British Constitution recognized certain fundamental rights that no government could violate, not even Parliament. After the Townshend Acts, some essayists even began to question whether Parliament had any legitimate jurisdiction in the colonies at all. Anticipating the arrangement of the British Commonwealth, by 1774 American writers such as Samuel Adams, James Wilson, and Thomas Jefferson were arguing that