is a specific kind of: crusader, meliorist, reformer, reformist, social reformer.

instances of which are: Beecher, Henry Ward Beecher | Brown, John Brown | Douglass, Frederick Douglass | Garrison, William Lloyd Garrison | Harriet Beecher Stowe, Harriet Elizabeth Beecher Stowe, Stowe | Arthur Tappan, Tappan | Sojourner Truth, Truth | Harriet Tubman, Tubman | Theodore Dwight Weld, Weld.

derivation: emancipation | abolitionism.