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.
C'était un mouvement mené par les Quakers, il ne devint populaire que quand le roman de Harriet Beecher Stowe « La case de l'Oncle Tom » devint un best-seller.