Back then the north and south were very different and developed differently
Dude. were apart now!
I honestly could not care less
The biggest reason was SLAVERY
The south had lots of farms and less stores. So they were like 'hey it's cheaper to own a slave than hire someone' but when they paid a slave they thought lets say a DOLLAR was to much money to pay a slave. But the north did not like that so they had no slaves in the north (YES). that's why the Civil war happened.