The political idealism of the Revolution also encouraged, and sometimes forced, white slave owners to liberate their slaves. - Allen C. Guelzo

Anyone who sits down for a moment to think about what the alternative would have looked like—a successful breakaway Confederacy—and how that would have flowed downstream has to be with impressed with what Lincoln was able to save us from. There is in the end no intrinsic reason why the Southern Confederacy should not have achieved its independence. And if they had, that would have had serious implications for the later role the North American continent plays in world affairs. Imagine a North American continent as divided politically and economically as South America. This would take the United States off the table as a major world player, and then what would you do with the history of the 20th century?

[T]he Civil War’s victors ended up blaming themselves, or at least allowing the defeated South to foist the blame on them. Postwar Southerners never accepted the results of military defeat in the war, and they resisted Reconstruction (and much more effectively than they had resisted the Union armies)...

[Abraham Lincoln believed that] [t]he only reason people do not succeed in a capitalist environment is because they are improvident, they are lazy, they are good for nothing, or they experience some incredible turn of bad luck—that’s why "better luck next time." That may seem like vanishingly small consolation to people who’ve just come through a depression, but for Lincoln, that kind of hardship paled beside slavery. Slavery says that there is a category of people that can never be allowed to rise, that cannot improve themselves no matter how hard they try because they will always be slaves. It’s very much the classic disjuncture between the Enlightenment and feudalism. Feudalism talks about people being born with status, and everyone comes into this world equipped with a status. This status is either free or slave, serf or nobility, elect or damned, whatever. For the Enlightenment people come into this world armed with rights, and the ideal political system is the system that allows them to realize those rights, to use those rights in the freest and most natural fashion possible.