American's have a real insecurity complex. I'd say that the American economy will be surpassed by China's in the next 30 years. The Chinese economy will have to change first, particularly their government.
Even still, it's probably worth noting that America's economy overtook the previous world power's just after World War II.
try 20 lol
so many homeless in the U.S. a quater of that could probably put them all in shelters