High Quality Content by WIKIPEDIA articles! William Lloyd Garrison (December 12, 1805 – May 24, 1879) was a prominent American abolitionist, journalist, and social reformer. He is best known as the editor of the abolitionist newspaper The Liberator, and as one of the founders of the American Anti-Slavery Society, he promoted "immediate emancipation" of slaves in the United States. Garrison was also a prominent voice for the women`s suffrage movement.