Tracing the monetary history of Europe, this study explores the impact of change in the availability and use of bullion, in the form of money, on the economic evolution of Europe. The Romans fostered economic prosperity through the accumulation of bullion and circulation of accredited currency. Over time, shortages of species rendered the Roman coinage worthless. As a result, commercial activities contracted, causing the breakdown of the Roman economic and political systems. Lack of liquidity in the early Middle Ages limited commercial activities, and promoted conditions sustaining...