Answer by taking a quote from the following article:

William Lloyd Garrison (December 10, 1805 - May 24, 1879) was a prominent American abolitionist, journalist, suffragist, and social reformer. He is best known as the editor of the abolitionist newspaper The Liberator, which he founded with Isaac Knapp in 1831 and published in Massachusetts until slavery was abolished by Constitutional amendment after the American Civil War. He was one of the founders of the American Anti-Slavery Society, and promoted "immediate emancipation" of slaves in the United States. Born in Newburyport, Massachusetts, Garrison began his newspaper career as an apprentice compositor for the Newburyport Herald.

In addition to publishing The Liberator, Garrison spearheaded the organization of a new movement to demand the total abolition of slavery in the United States. By January 1832, he had attracted enough followers to organize the New-England Anti-Slavery Society which, by the following summer, had dozens of affiliates and several thousand members. In December 1833, abolitionists from ten states founded the American Anti-Slavery Society (AAS). Although the New England society reorganized in 1835 as the Massachusetts Anti-Slavery Society, enabling state societies to form in the other New England states, it remained the hub of anti-slavery agitation throughout the antebellum period. Many affiliates were organized by women who responded to Garrison's appeals for women to take active part in the abolition movement. The largest of these was the Boston Female Anti-Slavery Society, which raised funds to support The Liberator, publish anti-slavery pamphlets, and conduct anti-slavery petition drives. The purpose of the American Anti-Slavery Society was the conversion of all Americans to the philosophy that "Slaveholding is a heinous crime in the sight of God" and that "duty, safety, and best interests of all concerned, require its immediate abandonment without expatriation." Meanwhile, on September 4, 1834, Garrison married Helen Eliza Benson (1811-1876), the daughter of a retired abolitionist merchant. The couple had five sons and two daughters, of whom a son and a daughter died as children. The threat posed by anti-slavery organizations and their activity drew violent reaction from slave interests in both the Southern and Northern states, with mobs breaking up anti-slavery meetings, assaulting lecturers, ransacking anti-slavery offices, burning postal sacks of anti-slavery pamphlets, and destroying anti-slavery presses. Healthy bounties were offered in Southern states for the capture of Garrison, "dead or alive". On October 21, 1835, a mob of several thousand surrounded the building housing Boston's anti-slavery offices, where Garrison had agreed to address a meeting of the Boston Female Anti-Slavery Society after the fiery British abolitionist George Thompson was unable to keep his engagement with them. Mayor Theodore Lyman persuaded the women to leave the building, but when the mob learned that Thompson was not within, they began yelling for Garrison. Lyman was a staunch anti-abolitionist but nonetheless wanted to avoid bloodshed and suggested Garrison escape by a back window while Lyman told the crowd Garrison was gone. The mob spotted and apprehended Garrison, tied a rope around his waist, and pulled him through the streets towards Boston Common, calling for tar and feathers. The mayor intervened and had Garrison arrested and rushed off to the Leverett Street Jail for his own protection. CANNOTANSWER

Was he successful in his anti slavery work?

founded the American Anti-Slavery Society (AAS). Although the New England society reorganized in 1835 as the Massachusetts Anti-Slavery Society, enabling state societies to form in the other New England states,