Sour wine, however, furthered the beverage's evolution. Dried-grape wines were developed in parts of the old Eastern Roman Empire, resulting in "heady, sweet libations that, owing to high levels of extract and alcohol, proved more stable than lighter wines made with fresh grapes." These sweet wines, called Romneys (for their Roman derivation), became highly desirable in Western Europe, so much so that Lukacs credits them with initiating the modern wine trade. Even while medieval wine was an everyman's drink, better-tasting, rarefied versions could be acquired by the well-off. And beer was a beverage for the poor.