THIS YEAR marks the tenth anniversary of the fall of the Berlin Wall, perhaps the most potent symbol of the Cold War. To commemorate that historic event, and to further understand the U.S. policies and actions that preceded it, the Hoover Institution cosponsored a symposium entitled “The Fall of the Berlin Wall: Reassessing the Causes and Consequences of the End of the Cold War” with the William J. Casey Institute of the Center for Security Policy. The symposium brought together several individuals who played pivotal roles in shaping American Cold War policy during the 1980s. Some of the participants not only served in the Reagan administration but have a long association with the Hoover Institution and the Center for Security Policy. Comments by the participants provided an important window on American foreign policymaking during the Reagan years. They also offered valuable insights into how we might meet the national security challenges of tomorrow. And it is with that in mind that we have published them in this collection.