https://www.answers.com/us-history/Who_were_the_first_to_pioneer_the_abolitionist_movement
The Puritans were some of the first groups to pioneer the abolitionist movement. The Mennonites and the Amish were also active in that cause.
the firstabolitionist movementpioneeranswers
https://data.bnf.fr/temp-work/364bb8e000d8a55a7ed91b9435f664a7/
Toutes les informations de la Bibliotheque Nationale de France sur : Building an antislavery wall, black Americans in the Atlantic abolitionist movement,...
black americansin thebuildingantislaverywall