JustAFan
The Adebayo Akinfenwa of football photoshoppers
Much of US infrastructure was built on the blood of the slaves and you are basically saying that slave owners fell behind because they owned slaves. That doesn't sound right, because they became rich because of slaves as well.
There are some historians who feel that if left on its own, the nasty institution of slavery would have eventually collapsed on it's own. That they say this, doesn't make it so, but it is an interesting take on things.