Ok
Whatever evil the North was trying to purvey as you all see it, the south was prospering off of slavery.
Period.
The North was prospering more.
Who was servicing those goods produced at least in large part by slave labor? The banking, shipping, insurance, “factors” (ie warehousing and logistics). Where was the tax revenue collected on the goods exchanged for those cash crops being spent overwhelmingly? Oh that’s right, in the North.
As difficult as this is to grasp, New York and Washington DC were profiting more from slavery than was the entire South.
Here's the map again. 73-85% of that money piled on New York came from slave production.