In the sixty years before the American Civil War, the South Carolina Upcountry evolved from an isolated subsistence region that served as a stronghold of Jeffersonian Republicanism into a mature cotton-producing region with a burgeoning commercial sector that served as a hotbed of Southern radicalism. This groundbreaking study examines this startling evolution, tracing the growth, logic, and strategy of pro-slavery radicalism and the circumstances and values of white society and politics to analyze why the white majority of the Old South ultimately supported the secession movement that led to bloody civil war.