Garrison was a relentless opponent of slavery from the beginning of his career as a journalist. He rejected gradual emancipation and demanded immediate and complete abolition. He founded The Liberator in 1831, which became one of the most influential newspapers of the abolitionist movement. In his writings, he fiercely criticized the institution of slavery, exposed the hypocrisy of slaveholders, and advocated for immediate emancipation and full civil and political rights for African Americans.
Garrison was a prominent leader and organizer of the American Anti-Slavery Society, formed in 1833, which played a crucial role in mobilizing public support for the abolitionist cause. He also established the New England Anti-Slavery Society in 1832 and served as its president. Through these organizations, he helped coordinate antislavery conventions, distribute literature, and raise awareness about the atrocities of slavery.
Garrison's radical views and uncompromising approach often drew criticism and opposition. He denounced the U.S. Constitution as "a covenant with death and an agreement with hell" because it failed to explicitly condemn slavery. He also refused to compromise with any political party that did not support immediate abolition, including the Republican Party, which ultimately led to the formation of the radical abolitionist American Anti-Slavery Party.
Despite the challenges he faced, Garrison's persistence and dedication to the abolitionist cause played a significant role in shaping public opinion and contributing to the eventual emancipation of enslaved people in the United States. He is remembered as one of the most influential figures of the abolitionist movement and a relentless advocate for social justice and human rights.