Who informed the nations first abolitionist group?

The first abolitionist group in the United States, the Society for Effecting the Abolition of the Slave Trade, was founded in 1787 in Philadelphia. It was primarily informed and influenced by Quakers, who were among the earliest religious groups to condemn slavery on moral and ethical grounds. Prominent figures like Anthony Benezet, a Quaker educator, played a crucial role in advocating for the abolition of slavery and organizing efforts against the slave trade.