In Utopia there is no distinct and separate science of economics. Many problems that we should regard as economic come within the scope of Utopian psychology. My Utopians make two divisions of the science of psychology, first, the general psychology of individuals, a sort of mental physiology separated by no definite line from physiology proper, and secondly, the psychology of relationship between individuals. This second is an exhaustive study of the reaction of people upon each other and of all possible relationships. It is a science of human aggregations, of all possible family groupings, of neighbours and neighbourhood, of companies, associations, unions, secret and public societies, religious groupings, of common ends and intercourse, and of the methods of intercourse and collective decision that hold human groups together, and finally of government and the State. The elucidation of economic relationships, depending as it does on the nature of the hypothesis of human aggregation actually in operation at any time, is considered to be subordinate and subsequent to this general science of Sociology. Political economy and economics, in our world now, consist of a hopeless muddle of social assumptions and preposterous psychology, and a few geographical and physical generalisations. Its ingredients will be classified out and widely separated in Utopian thought. On the one hand there will be the study of physical economies, ending in the descriptive treatment of society as an organisation for the conversion of all the available energy in nature to the material ends of mankind--a physical sociology which will be already at such a stage of practical development as to be giving the world this token coinage representing energy--and on the other there will be the study of economic problems as problems in the division of labour, having regard to a social organisation whose main ends are reproduction and education in an atmosphere of personal freedom. Each of these inquiries, working unencumbered by the other, will be continually contributing fresh valid conclusions for the use of the practical administrator.