You couldn't be more wrong. Many of the founding fathers realized that slavery was incompatible with the declaration of independence and our system of government. About 75% of the founding fathers, including Benjamin Franklin, were involved in the abolitionist movement. The abolitionist movement was started in 1773, three years before we declared our independence.
Thomas Jefferson himself proposed the abolition of slavery in Virginia in 1778 and again in 1796. And he was hardly a northern puritan.
“You couldn't be more wrong . . . About 75% of the founding fathers, including Benjamin Franklin, were involved in the abolitionist movement.”
Wrong about what? Benjamin Franklin was a slave owner. He published abolitionist literature late in life.
I'll grant his near deathbed repentance.