Why more slaves in the south than the north in the 1700s?

The southern states were pro-slavery and the northern states were anti-slavery

Explanation:

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

this is a good question! i'll do some research and come back when i have the answer!