Mark D. Szuchman is a professor of Latin American history and chair of the Department of History at Florida International University. The managing editor of "Hispanic American Historical Review," he is the author of "Order, Family, and Community in Buenos Aires, 1810-1860 "and "Mobility and Integration in Urban Argentina: Cordoba in the Liberal Era." Jonathan C. Brown is a professor of history at the University of Texas at Austin. He is the author of "A Socioeconomic History of Argentina, 1776-1860, "and "Oil and Revolution in Mexico."