‘Logistics won the day for the North. Yes, that was something Grant recognized. My point was that the industry that drove that military machine was run on what we would now call “slavery”.’
Sounds like a rationalization.
Sounds like a pointing out of hypocrisy to me.
Of course, the North didn’t fight the South over slavery. They fought to force them to remain in the Union at the point of a gun.
The British opinion of all this was interesting, to say the least. “So, it’s OK to secede from us, but damn them from trying to secede from you.”