“Slavery was at the root of what the Civil War was all about. If there had been no slavery, there would have been no war, and that ultimately what the Confederacy was fighting for was to preserve a nation based on a social system that incorporated slavery. Had that not been the case, there would have been no war. That's an issue that a lot of Southern whites today find hard to accept.”

We would not have been the bastion of freedom we have been in the twentieth century.
2000s, The Real Abraham Lincoln: A Debate (2002), Q&A

"Yankee Supremacists Trash South’s Heroes," http://praag.org/?p=19556 Praag.org June 26, 2015.
2010s, 2015

Documentary films, America: Imagine the World Without Her (2014)

p, 125
The Discovery of Slowness (1983, 1987)

During an after-dinner discussion in Munich https://books.google.com/books?id=2zxfyeUHKEAC&pg=PA69 (1933), regarding the American Civil War
Disputed, The Testament of Adolf Hitler (1945)
Context: This is the last disgusting death-rattle of a corrupt and outworn system which is a blot on the history of this people. Since the civil war, in which the southern states were conquered, against all historical logic and sound sense, the American people have been in a condition of political and popular decay. In that war, it was not the Southern States, but the American people themselves who were conquered. In this spurious blossoming of economic progress and power politics, America has ever since been drawn deeper into the mire of progressive self-destruction. The beginnings of a great new social order based on the principle of slavery and inequality were destroyed by that war, and with them also the embryo of a future truly great America that would not have been ruled by a corrupt caste of tradesmen, but by a real Herren-class that would have swept away all the falsities of liberty and equality.

Source: 2010s, Why the Left Hates America (2015)

JFK to Gore Vidal, quoted in David Swanson's Daybreak: Undoing the Imperial Presidency and Forming a More Perfect Union (2011).
Attributed

Speech to the Virginia Convention (1861)

A Vindication of Natural Society (1756)
Context: If pretended revelations have caused wars where they were opposed, and slavery where they were received, the pretended wise inventions of politicians have done the same. But the slavery has been much heavier, the wars far more bloody, and both more universal by many degrees. Show me any mischief produced by the madness or wickedness of theologians, and I will show you an hundred resulting from the ambition and villany of conquerors and statesmen. Show me an absurdity in religion, and I will undertake to show you an hundred for one in political laws and institutions. 'If you say, that natural religion is a sufficient guide without the foreign aid of revelation, on what principle should political laws become necessary? Is not the same reason available in theology and in politics? If the laws of nature are the laws of God, is it consistent with the Divine wisdom to prescribe rules to us, and leave the enforcement of them to the folly of human institutions? Will you follow truth but to a certain point?