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 the Declaration had been signed on July 4, pointing out that some signers were not then present, including several who were not even elected to Congress until after that date. The Declaration was transposed on paper, adopted by the Continental Congress, and signed by John Hancock, President of the Congress, on July 4, 1776, according to the 1911 record of events by the U.S. State Department under Secretary Philander C. Knox. On August 2, 1776, a parchment paper copy of the Declaration was signed by 56 persons. Many of these signers were not present when the original Declaration was adopted