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 to declare independence unless their instructions permitted such an action. Several colonies, in fact, expressly prohibited their delegates from taking any steps towards separation from Great Britain, while other delegations had instructions that were ambiguous on the issue; consequently, advocates of independence sought to have the Congressional instructions revised. For Congress to declare independence, a majority of delegations would need authorization to vote for it, and at least one colonial government would need to specifically instruct its delegation to propose a declaration of independence in Congress. Between April and July 1776, a "complex political war" was waged to bring this