This pamphlet is an adapted and updated version of the prologue to Tearing Down Walls: The International Monetary Fund 1990-1999, by the same author. That book examines a tumultuous decade in which the IMF faced difficult challenges and took on new and expanded roles. Among these were assisting countries that had long operated under central planning to manage transitions toward market economies, helping countries in financial crisis after sudden loss of support from private financial markets, adapting surveillance to reflect the growing acceptance of international standards for economic and financial policies, helping low-income countries grow and begin to eradicate poverty while staying within its mandate as a monetary institution, and providing adequate financial assistance to members in an age of limited official resources.