Other forms: abolitionists
An abolitionist was someone who wanted to end slavery, especially in the United States before the Civil War — when owning slaves was common practice.
Back when many landowners in the United States forced slaves to work their land, abolitionists believed that slavery violated the basic human right of freedom, and organized to make slavery illegal, writing anti-slavery literature, proposing new laws, and smuggling slaves into free Canada. The Latin root abolere means “destroy,” and an abolitionist is generally a person who wants to destroy any law or practice, like the abolitionists who fight to end the death penalty.