Answer:
A shift from diversified agriculture to sugar monoculture, from production on small farms to large plantations, from free to slave labour, from sparse to dense settlement, from white to black populations, and from low to high value per capita output.
Explanation:
No need.
The main reason was the South wanted to preserve slavery. The North wanted to abolish it. If you want some other reasons than slavery, let me know, and I will do my best to add more to this answer.
