Folks in this thread really don't understand Lee at all. He was more against the institution of Slavery than Grant was.
Hell, Grant's wife still owned them at the time of emancipation, yet Lee had divested so many years earlier.
Lee was so much more honorable than Grant in every way, it is unfathomable how folks could ever believe that Grant was better.
Lee had the honor to fight for his home, not so for Grant, Grant was a paid, opportunistic mercenary, and a bit of a drunk.
One only has to look at how they comparatively were viewed by their contemporaries at West Point and how the world military historians view them.
To the point about how the South was fighting for slavery, yes, of course that is true. However, if we look at how society treated women, children the poor, all of civilization's and society's mores were different.
What was not different was a democratic republic's, a soveriegn people's right to self-determination.
Lysander Spooner, one of the nation's foremost abolitionists, hated slavery, but understood, that using violence, to end violence, made the cause moot. The only thing the Union had any right to do was to cut the Southern states loose to let them do what they independantly choose to do.
And the slaves? In his view, it was their right, as sovereign people to rebel, and the Union's right to shelter run aways or aid rebellions. If the South wanted to declare war on the North for it's clandestine activities, that was it's business, but the non-agression principle should always come first among civilized and free people.
The North did aggress on the South by not withdrawing.
On the other hand. . . .
Let's not forget, it was the FEDERAL GOVERNMENT that created this mess, so it ends it with killing and mass destruction? Nice.
Spooner knew none of the Southerners were traitors, I can't understand why so many seem to think they were. Are these folks dumb are uneducated? Do they not know government and sovereignty? What about freedom?
As has already been stated in this thread, as humanity became wiser in the North, slavery disappeared. So too, did it else where on Earth. Likewise, it still exists in backwards regions of the Earth, and no amount of war is going to do anything about that. Spooner recognized there was a far greater threat to American society than slavery. . it was war. Today, we still bear the scar, politically, and socially of that war. Had things gone differently, I think the psychic and physical violence of that time might not have left such deep scars. The balkanization and cultural cleavages might not exist today. We might have had two nations, each with black Presidents years ago.