1 Introduction and overview. -- 2 The merchantilist school. -- 3 The physiocratic school. -- 4 The classical school-Forerunners. -- 5 The classical school-Adam Smith. -- 6 The classical school-Thomas Malthus. -- 7 The classical school-David Ricardo. -- 8 The classical school-Bentham, Say, Senior and Mill. -- 9 The rise of socialist thought. -- 10 Marxian socialism. -- 11 The German historical school. -- 12 The marginalist school-Forerunners. -- 13 The marginalist school-Jevons, Menger, Von Wieser, and Von Bohm-Bawerk. -- 14 The marginalist school-Edgeworth and Clark.-15 The neoclassical school-Alfred Marshall. -- 16 The neoclassical school -- monetary economics. -- 17 The neoclassical school-the departure from pure competition. -- 18 Mathematical economics. -- 19 The institutionalist school. -- 20 Welfare economics. -- 21 The Keynesian school-John Maynard Keynes. -- 22 The Keynesian school-developments since Keynes. -- 23 Theories of economic growth and development. -- 24 The Chicago school-The new classicism. -- 25 Concluding thought.