During more than twenty years of field research, Roderic Ai Camp built a monumental database of biographical information on more than 3,000 leading national figures in Mexico. In this major contribution to Mexican political history, he draws on that database to present a definitive account of the paths to power Mexican political leaders pursued during the period 1884 to 1992. Camp’s research clarifies the patterns of political recruitment in Mexico, showing the consequences of choosing one group over another. It calls into question numerous traditional assumptions, including that upward political mobility was a cause of the Mexican Revolution of 1910. Comparing Mexican practices with those in several East Asian countries also allows Camp to question many of the tenets of political recruitment theory. His book will be of interest to students not only of Mexican politics but also of history, comparative politics, political leadership, and Third World development.