sociology or whether it rests upon sociology. The view which has been presented thus far and which will be adhered to is that economics should rest upon sociology. That economics does rest upon sociology is shown by many considerations. The chief problem of theoretical economics is the problem of economic value. But economic value is but one sort of value which is recognized in society, moral and aesthetic values being other examples of the valuing process, and all values must express the collective judgment of some human group or other. The problem of economic value, in other words, reduces itself to a problem in social psychology, and when this is said it is equivalent to making economics dependent upon sociology, for social psychology is simply the psychological aspect of sociology. Again, industrial organization and industrial evolution are but parts or phases of social evolution in general, and it is safe to say that industry, both in its organization and evolution, cannot be understood apart from the general conditions, psychological and biological, which surround society. Again, many non-economic forces continually obtrude themselves upon the student of industrial conditions, such as custom, invention, imitation, standards, ideals, and the like. These are general social forces which play throughout all phases of human social life and so show the dependence of industry upon society in general, and, therefore, of economics upon sociology. Much more might be said in the way of concretely illustrating these statements, but the purpose of this text precludes anything but the briefest and most elementary statement of these theoretical facts.