There is a vast deal of inertia, of blind habit, of custom, etc. But emphasis on these factors is not marginal utility theory! Factors like these are emphasized by a functional psychology, and by a social psychology--not by an individualistic psychology which rests on the assumption of rational calculation. It is not _past_ utilities that explain present subjective values of money when these subjective values are out of harmony with the present market facts, but rather _present_ habits, present customs, present disinclination to readjust, etc. There is a big difference, psychologically, between the mental processes through which one arrived at one's present state of mind, and the present state of mind itself. The original "commodity utility" of the money metal, in the far away time before the money use affected its value, is surely no longer a factor. Certainly not on the basis of an individualistic psychology of the Austrian type. All the individuals who experienced that original utility are long since dead! Not even memories of the original utilities persist. When writing the passage in _Social Value_, quoted above, I did not suppose that I was dealing with a notion that anyone else would ever take seriously. My purpose in discussing it was chiefly to throw into sharp relief the contrast between the historical and the cross-section viewpoints, and to make clear that my own theory was based on analysis of existing psychological forces. Since finding, however, that two writers for whose views I have so much respect have independently developed the same idea, and have taken it seriously, I have felt it worth while to give it this extended consideration. Von Mises, like Wieser, needs an absolute value of money in his thinking. He does not call the concept by that name, but, following Menger[101] speaks of the "inner objective value of money" and the "outer objective value of money." (Mises, p. 132.) The latter is the purchasing power of money, a relative concept, exactly expressed in the price-level. The inner objective value of money is designed to cover the causes of changes in prices which originate on the money-side of the price relation alone.[102] This inner objective value of money performs the same logical function in the theory of money that the absolute social value concept of the present writer does, even though the psychological explanation lying behind it is very different. Von Mises considers the quantity theory at length, noting a number of defects in it, chief of which is the fact that it has no psychological theory of value behind it, that it does not account for the _existence_ of the value of money, and at most gives a law for _changes_ in a value whose existence is taken for granted. The details of this criticism, however, need not be here presented. The quantity theory is to be treated in detail at a later point of our study.