The cotton nabobs had made the South a no-go area for the Constitution... - Allen C. Guelzo

[E]verything in the reasoning of the founders pointed inexorably toward the incompatibility of liberty and equality with slavery...

Trying to plant such an oligarchy in the midst of what was otherwise the world's most successful republican regime was no small task, and it required the invention of ideological monstrosities to justify it. In the Southern case, the monstrosities included race-based rationales for the enslavement of Africans.

[E]ven a great man cannot be wise in everything.