Biography of the Dollar: How the Mighty Buck Conquered the World and Why It's Under SiegeWill the sun set on the greatest currency in the history of the world? For decades the dollar has been the undisputed champ. Its not only the currency of America but much of the world as well, the fuel of global prosperity. As the superengine of the worlds only superpower, its accepted everywhere. When an Asian company trades with South America, those transactions are done in dollars, the currency of international business. But for how much longer?