The closing paragraphs of the section (91) dwell with a kindly insistence on the many elements of strength and beauty possessed by the form of household organisation handed down from the past generation to the present. The facts herewith recited by the author are, no doubt, of weight, and must be duly taken account of by any economist who ventures on a genetic discussion of the present situation and the changing fortunes of the received household. But Professor Schmoller has failed even to point out in what manner these elements of strength and beauty have in the recent past or may in the present and immediate future causally affect the fortunes of the institution. The failure to turn the material in question to scientific account becomes almost culpable in Professor Schmoller, since there are few, if any, who are in so favorable a position to outline the argument which a theoretical account of the situation at this point must take. Plainly, as shown by Professor Schmoller's argument, economic exigencies are working an incessant cumulative change in the form of organisation of the modern household; but he has done little towards pointing out in what manner and with what effect these exigencies come into play. Neither has he gone at all into the converse question, equally grave as a question of economic theory, of how the persistence, even though qualified, of the patriarchal family has modified and is modifying economic structure and function at other points and qualifying or accentuating the very exigencies themselves to which the changes wrought in the institution are to be traced. Plainly, too, the strength and beauty of the traditionally received form of the household--that is to say, the habits of life and of complacency which are bound up with this household--are elements of importance in the modern situation as affects the degree of persistence and the direction of change which this institution shows under modern circumstances. They are psychological facts, facts of habit and propensity and spiritual fitness, the efficiency of which as live forces making for survival or variation is in this connection probably second to that of no other factors that could be named. We had, therefore, almost a right to expect that Professor Schmoller's profound and comprehensive erudition in the fields of psychology and cultural growth should turn these facts to better ends than a preachment concerning an intrinsically desirable consummation.