Via Sullivan, Salon presents four possible scenarios that could very well happen:
Despite the aura of omnipotence most empires project, a look at their history should remind us that they are fragile organisms. So delicate is their ecology of power that, when things start to go truly bad, empires regularly unravel with unholy speed: just a year for Portugal, two years for the Soviet Union, eight years for France, 11 years for the Ottomans, 17 years for Great Britain, and, in all likelihood, 22 years for the United States, counting from the crucial year 2003.
when Washington's global dominion finally ends, there will be painful daily reminders of what such a loss of power means for Americans in every walk of life. As a half-dozen European nations have discovered, imperial decline tends to have a remarkably demoralizing impact on a society, regularly bringing at least a generation of economic privation. As the economy cools, political temperatures rise, often sparking serious domestic unrest.
This will be interesting, anyway.