Mason-Dixon"Deeply researched and highly readable." Eric Foner, Times Literary Supplement "A rich history of regional distinctions, especially as they shaped the antebellum Republic." Kirkus Reviews "A fitting testament to a career marked by boundary crossing curiosity and stalwart service to the historical profession[a] splendid new history." Richard Bell, Register of the Kentucky Historical Society "Fascinatingdoes justice to the full sweep and complexity of