The Religious Society of Friends (Quakers) was the first corporate body in Britain and North America to fully condemn slavery as both ethically and religiously wrong in all circumstances. It is in Quaker records that we have some of the earliest manifestations of anti-slavery sentiment, dating from the 1600s. After the 1750s, Quakers actively engaged in attempting to sway public opinion in Britain and America against the slave trade and slavery in general. At the same time, Quakers became actively involved in the economic, educational and political well being of the formerly enslaved.

The earliest anti-slavery organizations in America and Britain consisted primarily of members of the Society of Friends. Thus much of the record of the development of anti-slavery thought and actions is embedded in Quaker-produced records and documents. Friends Historical Library at Swarthmore College and the Quaker Collection at Haverford College are jointly the custodians of Quaker meeting records of the Mid-Atlantic region, including Pennsylvania, Delaware, Maryland, Virginia, New York and Vermont and these records illuminate the origins of the anti-slavery movement as well as the continued Quaker involvement, often behind the scenes, in the leadership and direction of the abolitionist movement from the 1770s to the abolition of slavery in the United States in 1865, and beyond.