This affected the South because up in the North they can grow more crops (abundance of corn, wheat, Barley, etc) with the wetter grounds and having a lot of livestock. And with most of the settlers being immigrants or people who opposed slavery, they aren't going to want to trade or sell with the South. Along with Congress prohibiting slavery in the Northwest Territory in 1787, now the South can't have farms with slaves in the North and make more money, and if slaves escape to the North, they'll be helped most of the time and the South will be screwed.
Explanation: Because I've done a lot of Civil war learning, hope this helps :)
<span>Copernicus posited a heliocentric or sun-centered conception of the universe; Kepler contributed the three laws of planetary motion; and Galileo's telescope led to observations of earth like planets rather than ethereal planets.</span>
