In &dquo The Theory of Sociology, &dquo * I contended that &dquo political economy,&dquo viewed as a science of commercial relations or market values, and &dquopure economics,&dquo conceived as a science of subjective utility, cost and value, are social sciences, and that neither can stand, in a classification of the sciences, logically antecedent to theoretical sociology. Both of them, I claimed, presuppose sociology, because, as I undertook to show, subjective utility has been created by social conditions and was not antecedent to them.