This course considers major methodological issues, explains the relationships between the development of a theory and the prevailing economic conditions, and examines the internal working of theories that provide particularly useful insights. It also explains the significance of particular ideas to the development of theory and the broader implications of theory for the formulation of economic and social policy, and The aim of this course is to chart the development of economics through the ages, primarily demonstrating how past mainstream thought has contributed to the scope and content of modern economics, but also discussing deviations from orthodoxy that have helped to shape contemporary economic thought.