Far from a monolithic block of diehard slave states, the South in the eight decades before the Civil War was, in William Freehling's words, a world so lushly various as to be a storyteller's dream. It was a world where Deep South cotton planters clashed with South Carolina rice growers,
where the egalitarian spirit sweeping the North seeped down through border states already uncertain about slavery, where even sections of the same state (for instance,...