In the South, however, slavery was justified in many ways. The Nat Turner Uprising of 1831 had terrified Southern whites. Moreover, the expansion of "King Cotton" into the Deep South further entrenched the institution into Southern society. John Calhoun's treatise, "The Pro-Slavery Argument", stated that slavery was not simply a necessary evil but a positive good. Slavery was a blessing to so-called African savages. It civilized them and provided them with the lifelong security that they needed. Under this argument, the pro-slavery proponents believed that the African Americans were unable to take care of themselves because they were biologically inferior. Furthermore, white Southerners looked upon the North and Britain as soulless industrial societies with little culture. Whereas the North was dirty, dangerous, industrial, fast-paced, and greedy, pro-slavery proponents believed that the South was civilized, stable, orderly, and moved at a 'human pace.'