The American Anti-Slavery Society (AASS) was officially organized in Philadelphia by prominent abolitionists including William Lloyd Garrison, Arthur Tappan, and Frederick Douglass (who later became a key voice in the movement). The society was founded on the principle of immediate emancipation of all enslaved people in the United States.
The anti-slavery movement had its roots in Europe during the 1770s, particularly in Britain, and gained momentum in the U.S. during and after the American Revolutionary War. The AASS played a major role in uniting abolitionist voices and spreading anti-slavery literature and petitions across the country, helping lay the foundation for the Civil War-era emancipation efforts.
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