John Woolman, abolition pioneer who persuaded American Quakers in 1758 to disavow the keeping of slaves. By 1780, no slaves were held by Quakers anywhere.(The LIFE Picture Collection via Getty Images)
John Woolman, abolition pioneer who persuaded American Quakers in 1758 to disavow the keeping of slaves. By 1780, no slaves were held by Quakers anywhere.(The LIFE Picture Collection via Getty Images)