1800. Vermont leads the Northern states in abolishing and phasing out slavery, while the South begins its greatest expansion. As the nation develops westward and cotton replaces tobacco as its most valuable crop, slavery is increasingly divisive. African American slaves Harriet Jacobs and Louis Hughes escape bondage to expose the horrific realities of the slave experience in autobiographical narratives. These and other stories of physical, psychological, and sexual exploitation reinvigorate the Northern abolitionist movement led by Frederick Douglass, Sojourner Truth, and Amy Post.