Yeah, I know. It took 725,000 American lives to accomplish that for 3 million slaves.
In an indirect manner.
I believe the bad spirituality (hypocrisy, really) over slaves was a major factor in pitching America into the crazy Civil War. Both North and South.
This set the scene for the Emancipation Proclamation although that wasn’t even purposed so much for the benefit of the slaves as for the detriment of the South. And a few years later, the North followed suit in the Constitution, the train of freedom for the slaves having become unstoppable.
Now if America had made a clean break at that point, we probably would have had a different story today, with far more cordial race relations. However the Southern Democrats dug in with a vengeful grudge. What they couldn’t enslave, they COULD Jim-Crow.