Europe had a ruling class which was able to simply expropriate people (slaveholders) by fiat. The same ruling class has not lost its hold. In the 20th Century, in the West, they have systematically expropriated people of the better part of their property and wages, always by fiat.
In America, slavery couldn't be ended without bloodshed. Neither side was going to back down. The Civil War was absolutely about slavery. Had there been no slavery, there wouldn't have been a civil war. What ELSE was motivating Americans on both sides of the line to be SO fanatically absolutist in their politics? Not tarriffs. Not anything. Slavery was the indigestible lump that tore the nation apart.
Okay. if this is an indication of your grasp of history, then argument is pointless. The Emancipation Proclamation only applied to the slave states in the Confederate South, (ignore those slave states in the Union North behind the curtain).