In this expansive work, leading economist Jose Villacis traces the origins of macroeconomics by studying the works of the leading researchers in the field. In particular, Villacis examines the research of Spanish economist German Bernacer (1883-1965), who outlined the fundamentals of macroeconomics and formed the foundation for future generations of researchers and thinkers in economics. The book includes a foreword by the leading economics Paul Samuelson.