What Made Babylon So Wealthy And Why?

OIL! Babylon is believed to be Modern Day Iraq, the same setting believed to be where God placed the Garden of Eden. My own person belief is that America is the Last Days Babylon and will fall like the rest of the ruling empires before. Isn't it funny how America, being such a massive country and Israel being the smallest country ever, no one can seem to cause a total collapse of it's existence. Oil is the only reason why these countries can even buy, sell or trade! All that's missing is a mark on the foreheads and their hands......?