The Vikings called North America "Vinland," the land of wine. Giovanni de Verrazzano, the Italian explorer who first described the grapes of the New World, was sure that "they would yield excellent wines." And when the English settlers found grapes growing so thickly that they covered the ground down to the very seashore, they concluded that "in all the world the like abundance is not to be found." Thus, from the very beginning the promise of America...