Michael O'Brien has masterfully abridged his award-winning two-volume intellectual history of the Old South, Conjectures of Order, depicting a culture that was simultaneously national, postcolonial, and imperial, influenced by European intellectual traditions, yet also deeply implicated in the making of the American mind.

Here O'Brien succinctly and fluidly surveys the lives and works of many significant Southern intellectuals, including John C. Calhoun, Louisa McCord, James Henley Thornwell, and George Fitzhugh. Looking over the period, O'Brien identifies a movement from...