Which abolitionist convinced the Quakers to recognize the immorality of slavery?

John Woolman played a pivotal role in convincing the Quakers to recognize the immorality of slavery through his passionate writings and activism in the 18th century. As a member of the Religious Society of Friends, he was deeply troubled by the ethical implications of slavery and sought to bring the issue to the forefront of Quaker conscience. Woolman’s influential pamphlet, "Some Considerations on the Keeping of Negroes," highlighted the moral and spiritual consequences of owning slaves. His work ultimately led to a collective re-evaluation among Quakers, resulting in the denomination's gradual movement towards abolition. This change was significant in the context of the larger abolitionist movement, as it influenced other religious groups to address the issue of slavery. His efforts exemplified how moral persuasiveness and personal integrity could lead to social reform, thus making him a central figure in the abolitionist cause within Quaker communities.