Quote Originally Posted by BigMat View Post
Just want to play with this idea because I never understand the comparison of the US to Rome.

One of the root causes of the CREATION of the United States was the uncontrolled migrations of various hostile tribes (European states), leading to the eventual conquering OF those tribes.
The comparison is only meant to demonstrate how extreme demographic shifts typically don't turn out well for those whose position is usurped. Your example is a good one, too.