2. Economic troubles and over-reliance on slave labor
$20 Trillion in national debt coupled with the $15./hr. movement for fast-food workers
3. The rise of the Eastern Empire
The Eastern Empire being China, of course. Now they want to battle us is space.
5. Government corruption and political instability
We have a Congress that has never been more divided, in modern times. Couple that with the fact that Trump can't even get his cabinet nominees/legislation approved, due to obfuscation from the Communist Party and...well.
6. The migration of Barbarian tribes
Obama's policy of allowing illegals into this country, which allows a multitude of subversives, with bad intent to freely cross over, will haunt us for many, many years to come.
7. Christianity and the loss of traditional values
Radical Islamics/Islamists (semantics) want to impose Sharia Law in this country and if you think we've already seen the loss of traditional values, to date...just wait until the carnage erupts. Christianity is not included in the efforts by this country to offer protection from persecution, particularly in the Middle East. (US Gov't. approved)
8. Weakening of the Roman legions
Obama went out of his way to weaken the US Military, not to mention cripple NASA. The future weaponry for self-defense, lies in low earth orbit.
You may want to re-assess your historical viewpoint.