Frederick Douglass, born a slave in 1818, would become one of the most visible and outspoken black abolitionists of the 19thcentury. He grew up in a rapidly expanding United States, whose very expansion stoked debate over the existence of slavery. White slavery advocates began a new vein of argument in defense of slavery: it was no longer an “evil,” but “a positive good.” In his famous 1837 speech to Congress, John C. Calhoun made his “positive good” claim, arguing both blacks and whites benefitted from the institution of slavery, especially as it was constructed in the South.