By 1781 which Founding Father had become the president of the Pennsylvania Abolition Society?Samuel ChaseThomas JeffersonPatrick HenryBenjamin Franklin

The correct answer is Benjamin Franklin.

Benjamin Franklin became the president of the Pennsylvania Abolition Society in 1781. The Pennsylvania Abolition Society was one of the earliest organizations in the United States dedicated to the abolition of slavery. Franklin was a key figure in this movement as he had evolved in his views on slavery over his lifetime. Initially, he owned slaves, but by the time he became involved with the Abolition Society, he had become a staunch advocate for the rights of African Americans and worked towards policies that would lead to the emancipation of enslaved individuals. His leadership in this organization reflects his broader efforts towards promoting human rights and social justice, which were deeply rooted in his Enlightenment ideals.