More specifically, the South wanted slaves counted for population purposes, not for more EC votes, but so they could have more Representatives in Congress. However, the North said that if slaves were counted, then the South was admitting the slaves were human and that they were going against everything the Republic stood for. So the South came up with the 3/5 compromise to get slaves counted as population (So they could have more then like 10 representatives total), without having to admit they were just as human as anyone else. Racism in action!