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.
Since Dickens saw very little of slavery, how could it be otherwise?
“Wars are rarely about the milk of human kindness and always about power, land or money.”
That’s true. Secesh didn’t just think blacks were inferior, they wanted to protect their wealth. Hence their reason to secede, and start a war to achieve that objective.