William Lloyd Garrison was an American abolitionist, journalist, and social reformer. He is best known for his widely read anti-slavery newspaper The Liberator, which Garrison founded in 1831 and published in Boston until slavery in the United States was abolished by the Thirteenth Amendment in 1865.

In the United States, abolitionism, the movement that sought to end slavery in the country, was active from the colonial era until the American Civil War, the end of which brought about the abolition of American slavery, except as punishment for a crime, through the Thirteenth Amendment to the United States Constitution.