This text traces the story of the development of utilitarian political economy. It discusses thinkers such as Bentham, James and John Mill, Jevons, Sidgwick and Edgeworth who all saw themselves as members of a distinct school of economists who took themselves as members of a distinct school of economists who took the pursuit of happiness as a guiding principle for the behaviour of individuals and governments. The greatest of general happiness became the ultimate test for all public policy and economic issues. The author's account of the development of utilitarian economics from the 18th to 19th centuries examines: the links between classical economics and the utilitarians; the influence of utilitarianism on modern welfare economics; and the lives and times of the classical utilitarians. The text emphasizes that the classical utilitarians held contradictory views on what happiness could include, how utility could be measured and whether they were radical reformers or supporters of the establishment.