What brought down the British Empire was it's debts to America.
What brought down the German Empire was it's debts to France which led to the greatest recession the world has even known.
What is bringing down America is it's debt.
The writing is on the wall, you United States. Your civilization is doomed because you are so much in debt and you don't even change your ways.
Doomed, I say! Doomed!
http://www.nytimes.com/2010/08/22/business/22gret.html?src=me&ref=business
Will ye no think kindly on those who would be your friends! May the sun shine with your thoughts, today, and happiness grow in your heart! May you allow yourself some peace of mind.