Perhaps, and so were the Romans, Spanish and British before their empires started to collapse.
If we collapse, it will be because of uncontrolled immigration and because we lost our way morally as a people.
"Perhaps, and so were the Romans, Spanish and British before their empires started to collapse."
With the small difference that each of those 'empires' were built upon and operating within completely different global economic systems than the one in which the United States operates today.