The south was an agrarian economy based on slavery and the north was a developing as an industrialist base and south grew crops as the shipping of oversea production.
The northern states had no slavery and were equal society and the white population lived in farther north and outnumbered the south in terms of the disparity of the people.
The main reason they most likely created this law is because they didn't want to be over controlling alongside Britain and how they ruled. They most likely wanted to give freedom to promote the idea of a free country and free from Britain.
