Indeed, Emerson in 1835, saw race as central to American greatness:

The inhabitants of the United States, especially of the Northern portion, are descended from the people of England and have inherited the trais of their national character...It is common with the Franks to break their faith and laugh at it The race of Franks is faithless.

Emerson was not alone, as historian James McPherson points out, Southerners not only thought of themselves as a race separate from blacks, but as a race apart from Northern whites:

The South's leading writer on political economy, James B. D. De Bow, subscribed to this Norman-Cavalier thesis and helped to popularize it in De Bow's Review. As the lower-South states seceded one after another during the winter of 1860-61, this influential journal carried several long articles justifying secession on the grounds of irreconcilable ethnic differences between Southern and Northern whites. "The Cavaliers, Jacobites, and Huguenots, who settled the South, naturally hate, contemn, and despise the Puritans who settled the North," proclaimed one of these articles. "The former are a master-race; the latter a slave race, the descendants of Saxon serfs." The South was now achieving its "independent destiny" by repudiating the failed experiment of civic nationalism that had foolishly tried in 1789 to "erect one nation out of two irreconcilable peoples."