By the way, Dickens did very little traveling in the South and it is quite likely that most of his so-called observations about slavery were take lifted from other documents he had read and stories he had been told.
It was about preserving the existing economic structure where the New York was taking approximately 60% of the total profits from all slave produced goods.
Wake up! This is why they had no problem passing the Corwin amendment. They didn't give a d@mn about the slaves, but they wanted to keep that money flowing into their pockets.
You need to be more cynical. Wars are rarely about the milk of human kindness and always about power, land or money.