An “inconvenient truth.”
Another inconvenient truth is that the Civil War was not initiated to end slavery, it was initiated to stop independence for people who wanted to be free of Washington D.C.
Ending Slavery did not become a goal of the war until a year and a half later. Hypocritically enough, Slavery was ended in the Confederacy before it was ended in the Union.
I have learned just this year that the Union launched the war against the South to get back 200 million in European Trade revenue produced by the South, and 3/4ths of which paid all the bills to operate the Federal Government.
The 75% of the population that lived in the North only paid 25% of the cost of running the Federal Government. The South, meaning mostly the slaves, paid all the rest.
There has just been a lot of propaganda spread on this issue, but the economic data doesn't lie. It was a financial disaster for the Union when the South split away from them.