Origins of modern economics -- Adam Smith's theory of value -- Origins of modern growth theory -- Classical monetary theory -- Ricardo on value, distribution and growth -- Scope and methodology of classical political economy -- The marginal revolution and the neo-classical triumph -- The neo-classical theory of value -- The Marxian alternative -- Neo-classical orthodoxy in the inter-war period -- Monetary theory in the neo-classical era -- The Keynesian revolution -- Twentieth-centuty growth theory -- Methodological divisions in economics since Keynes.