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Born in Britain’s great age of reform, this 1823 anti-slavery organization helped turn moral protest into a national political campaign. Its work pushed the British Empire toward the ending of slavery and laid groundwork for later abolitionist movements.

by Society for the Mitigation and Gradual Abolition of Slavery Throughout the British Dominions
Founded in London on January 31, 1823, the Society for the Mitigation and Gradual Abolition of Slavery Throughout the British Dominions was better known as the Anti-Slavery Society. It emerged after the earlier campaign against the slave trade and focused on a new goal: ending slavery itself across the British Empire.
The group is closely associated with leading abolitionists such as Thomas Fowell Buxton, and it helped organize petitions, publications, public meetings, and parliamentary pressure. Rather than treating slavery as a distant colonial issue, it kept the subject in front of the British public and lawmakers until abolition became politically unavoidable.
Its central aim was largely achieved through the Slavery Abolition Act of 1833, with full emancipation taking effect in 1838 after the end of the apprenticeship system. The society then gave way to successor organizations, but its influence remained strong in the wider international fight against slavery.