Once on a plane to New Orleans I chanced to half overhear a conversation between two passengers who shared the same row of seats with me. Somewhere between wakefulness and drowsiness, my ear caught a telltale accent that betrayed one of my seatmates as an Orleanian as they chatted animatedly about the Crescent City, Louisiana, and the ways that both diverged from the rest of the country. The native noted reverently the influence of the Roman Catholic Church, he remarked grandly on the extraordinary cuisine, he waxed pridefully about the city as the birthplace of jazz, and he spoke warmly about the manifold ethnic origins of his fellow Louisianians. Then, as if to fortify his contention that he hailed from a truly unusual place, he pointedly observed that Louisiana was the only state in the nation whose legal system rested upon the Napoleonic Code, even as he confessed to an uncertainty about why that difference existed or what it meant precisely.