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 Parliament was the legislature of Great Britain only, and that the colonies, which had their own legislatures, were connected to the rest of the empire only through their allegiance to the Crown. The issue of Parliament's authority in the colonies became a crisis after Parliament passed the Coercive Acts (known as the Intolerable Acts in the colonies) in 1774 to punish the colonists for the Gaspee Affair of 1772 and the Boston Tea Party of 1773. Many colonists saw the Coercive Acts as a violation of the British Constitution and thus a threat to the liberties of all of British