Lincoln was a response to a determined effort by the proponents of slavery to extend slavery into the new territories of the west, into the free states of the north, and into to-be-acquired territories to the south.
He had his shortcomings, and there are aspects of the country changed under his watch that I certainly don’t approve of. But when I consider what the world would be like, had his opponents carried the day, I have to credit him for making the world a better place.
How can you consider what the world would be like if the Civil War had not existed?
You can have a theory, but only that.
Slavery would have died out on it’s own as new farm equipment did away with the need for it. Thousands of men would have lived.
He was a degenerate mass murderer and tyrant who is directly responsible for the fact that all working men are today slaves to the federal government.
Not only that, but once the CSA was formed it would have gone on a land grab, using slavery to take and hold the new territory.
People in the North and probably quite a few in the South wanted to settle the new territory, and become prosperous using their own labor.
The Law of Economics would have destroyed slavery by itself.
Econ Prof. W.Williams expounded on the fact that Lincoln fought the Constitution, and won:
http://www.vindicatingthefounders.com/library/walter-williams.html