This text is a follow up volume to "The Persian Gulf at the Millennium: Essays in Politics, Economy, Security and Religion", published by St. Martin's Press in 1997. The same editors, who direct the Gulf/2000 Project at Columbia University, have assembled a number of leading experts on the Persian Gulf to reflect on factors affecting security there in the 21st century. Most contributors are from the region itself and share the results of ongoing research with an outside audience. The chapters profile the diverse society in the Gulf and the historical pattern of Gulf security, before focusing on security concerns between Iran and the Arab states. They explore the mutual perceptions of the peoples of the Gulf today and the role of the new generation in shaping its future.