Abolitionists were individuals and groups who advocated for the end of slavery, particularly in the United States during the 19th century. They believed that slavery was morally wrong and fought for the rights and freedom of enslaved people. Prominent abolitionists included figures like Frederick Douglass, Harriet Tubman, and William Lloyd Garrison, who used speeches, writings, and activism to raise awareness and promote change. The abolitionist movement gained momentum in the 1830s and 1840s, leading to significant social and political changes. Abolitionists organized rallies, published newspapers, and helped enslaved individuals escape through the Underground Railroad. Their efforts contributed to the eventual passage of the 13th Amendment in 1865, which abolished slavery in the United States.