The general function of values, whether pecuniary or other, is to direct the energies of men and of the social wholes in which men co-operate. In this paper I mean to inquire what part pecuniary values have in this function, how far they serve, or ought to serve, as the motive force of social organization and progress, what they can and cannot do. The discussion, I may add, is based on the view maintained in a previous paper,' that the activities of the pecuniary market, taken as a whole, constitute a social institution of much the same general character as other great institutions, such as the church or the state. It seems clear that the distinctive function of money valuation is to generalize or assimilate values through a common measure. In this way it gives them reach and flexibility, so that many sorts of value are enabled to work freely together throughout the social system, instead of being confined to a small province. And since values represent the powers of society, the result is that these powers are organized in a large way and enabled to co-operate in a vital whole. Any market value that I, for instance, may control ceases to be merely local in its application and becomes a generalized force that I can apply anywhere. If I can earn a thousand dollars teaching bacteriology, I can take the money and go to Europe, exchanging my recondite knowledge for the services, say, of guides in the Alps, who never heard of bacteriology. Other values are similarly generalized and the result is a mobility that enables many sorts of value, reduced to a common measure, to be applied anywhere and anyhow that the holder may think desirable. We have, then, to do with a value institution or process, far transcending in reach any special sort of value, and participating in the most diverse phases of our life. Its function resembles that of language, and its ideal may be said to be to do for value what