If that is true, why has the American South always been the poorest part of the Untied States? The only people in the South who benefited from slavery were the fairly small minority of whites who owned slaves. Family farms could not compete with plantations. Nearly every trade or profession paid more in the free states than the slave states. The great majority of European immigrants moved to the free states, because that was where the economic opportunities were.But the point is, you all still benefited from slavery being a thing. Without slavery, and the influx of profits from cash crops like Cotton and Tobacco, the US would never have become a wealthy nation.
The industrial revolution happened in the North. The computer revolution is happening on the West Coast.