If we are to have a foundation upon which to continue to build a more perfect union, we must return unequivocally, as Lincoln returned, to the source… - Harry V. Jaffa

The vice-president and the president of the Confederate States of America grounded their justification of American slavery on the grounds of a fraudulent science and a crazy fundamentalism. No sane person today can regard them as other than pathetic reminders of a society, like Nazi Germany, mentally unbalanced by its commitment to human inequality.

Hubert Humphrey, one of the chief authors and sponsors of the Civil Rights Act of 1964, had declared that under Title VII no discrimination on the basis of race or color was to be lawful. He explicitly said that this meant no discrimination of white against black, and no discrimination of black against white.

To allow slavery to be introduced into free territories, where it had not hitherto existed, was, Abraham Lincoln held, a very bad thing. His opponent, Stephen A. Douglas, held that it was a sacred right, belonging to the people of each territory, to decide for themselves whether or not to have slavery among their domestic institutions. According to Douglas, Lincoln wanted to destroy the diversity upon which the union had subsisted, by insisting that all the states ought to be free. But for Douglas himself, the principle of 'popular sovereignty' did not admit of exceptions. There was to be no diversity, no deviation from the right of the people to decide. For Lincoln the wrongness of slavery meant that no one, and no people, had the right to decide in its favor. For Lincoln, the principle of human equality, "that all men are created equal", did not admit exceptions.