Sixteen of the European Union's twenty-seven member states share an economic and monetary union (EMU) with the euro as a single currency. Based on a gross domestic product (GDP) and global trade and investment shares comparable to the United States, these countries (collectively referred to as the Eurozone) are a major player in the world economy and can affect U.S. economic and political interests in significant ways. This book provides background information and analysis on the future of the Eurozone and discusses its origins, rationale, economic significance, key provisions and design challenges.