The abolitionist among the people mentioned are Theodore Weld, Harriet Beecher Stowe, Sojourner Truth were abolitionists.
Theodore Dwight Weld was one of the creators of the American abolitionist movement during its formative years playing a role as writer, editor, speaker, and organizer.
Harriet Elisabeth Beecher Stowe was an American abolitionist and author.
Sojourner Truth was an African-American abolitionist and women's rights activist.
Abolitionism in the United States refered to the movement before and during the American Civil War which sought to end slavery in the United States.