Further, the code of proprieties in vogue at any given time or in any society has the character of an organic whole, and any important infringement upon it is likely to derange it. This conservative quality goes so far as to tend toward spiritual survival and reversion. The idea of prowess survives in our barbaric admiration of military exploits, in the taste for sports, and in the gambling tendency, which is based on belief in luck and is enhanced by the desire to triumph at the expense of another. A connection is traced between the admiration of prowess and the cultivation of the devotional spirit which, joined with the fondness for display, leads all worshipers eventually to elaboration of rituals. A further development, classed as Survivals of the Non-Invidious Interest, is that of beneficences. The Higher Learning was primarily the exclusive privilege of the leisure class, and has still attached to it a mass of ritual in the shape of paraphernalia, ceremonies, degrees, and privileges which grow more elaborate as the college and the community become richer. Devotion to classical learning, which is practically useless, is a form of "conspicuous leisure" and "conspicuous expenditure," but now encounters a rival in athletics, which is equally useless and conspicuous and more costly. [Footnote 58: The Theory of the Leisure Class. An Economic Study in the Evolution of Institutions. By Thorstein Veblen. New York: The Macmillan Company. Pp. 400. Price, $2.] The American Economic Association, at its meeting in Cleveland, Ohio, in 1897, authorized the appointment of a committee to inquire into the scope and method of the eleventh census, with a view of determining what ought to be attempted in the twelfth. In order to make an adequate review of the eleventh census this committee invited a certain number of critical articles on particular portions of the work; and further, in order to discover what might seem weak points in the work and what inquiries it might seem desirable to elaborate in the twelfth census, addressed a circular letter of questions to all the members of the association. Only about sixty replies were received to the questions, but a generous response was made to the invitations to contribute reviews, the result of which is a series of papers by independent authors upon specific topics which are regarded as constituting a very valuable commentary on the Federal census and on statistical methods in general. These criticisms are now embodied in a book[59] of more than five hundred pages, containing twenty essays by authors each of whom is specially interested in the particular topic of which he treats. These articles include a general review of the statistics of population, by Walter F. Wilcox, and special articles on the negro population, by W. Z. Ripley; the North American Indians, by Franz Boas; Age, Sex, Dwellings, and Families, and Urban Population, by George K.