-Northern states were pushing to end slavery which the South didn't want -Most changes the North were trying to make mostly benefited the North. Example: The North didn't want the South ordering products directly from England. The shipments went to the North and the South paid more to get them from the North when they could pay less by buying directly from England. TL:DR North paid less for goods and made the South pay more to get them. This is what I learned from my teacher. There were more reason thanthis however.