>>509918713Raw material areas vs. Industrial areas due to power balance in final product making, taxes regarding that and ultimately in the interpretation of the states' union deal and the rights to secede from it.
Slaves were part of the equation due to being a deciding economical factor regarding early industrialization but not the reason itself, the fight mostly boils down in yanks pushing the good tech for them at federal levels and leaving the southern hinterland out of the perceived progress.
City slickers vs. Country pumpkins