It was a movement spearheaded by the Quakers, and it only became popular when Harriet Beecher Stowe's novel "Uncle Tom's Cabin" became a bestseller.
Foi um movimento liderado pelos Quacre, e somente tornou-se popular quando o romance de Harriet Beecher Stowe "A Cabana do Pai Tomás"  tornou-se um best-seller.