Historians have long argued about the place of trade in classical antiquity: was it the life-blood of a complex, Mediterranean-wide economic system, or a thin veneer on the surface of an underdeveloped agrarian society? Trade underpinned the growth of Athenian and Roman power, helping to supply armies and cities. It furnished the goods that ancient elites needed to maintain their dominance - and yet, those same elites generally regarded trade and...