Even prior to the age of Columbus, the decimal system made its appearance in certain more civilized parts of the Western world where the duodecimal system was never known. That the former originated independently in different places, is rendered all the more likely by the fact that even primitive man used his ten fingers as an aid in counting, in spite of the fact that he had not as yet formed words for numbers greater than three or four. But, however natural this method of counting may be, its application to the organization of the group and the division of peoples nevertheless represents a _deliberately adopted_ plan. If possible, this is even more true here than in the case of the duodecimal system. We are now face to face with the wide difference that separates political society from totemic tribal organization. In developing on the principle of dual division, the latter resembles a natural process which runs its own course apart from any operation of conscious intention, even though directly influenced, of course, by the general conditions of human life. The organization of society according to the number ten, on the other hand, can be interpreted only as an intentional act. Hence history not infrequently brings this form of organization into direct association with the names of individual lawgivers, with Clisthenes of Athens or Servius Tullius of Rome. No doubt, a basis for this new order had been prepared by the general conditions of a society which had progressed beyond the totemic stage. Its systematic introduction, however, and the series of decimal subdivisions that ensued, are only conceivable as a legislative act emanating from a personal will. In the formation of social groups, no less than in the classification and enumeration of external objects of nature, there may at times have been some vacillation of choice between the duodecimal and the decimal systems. In its application to human society, however, the decimal system finally prevailed. Indeed, the simple means of counting afforded by our ten fingers supplanted the system suggested by the firmament in every field of use, except in connection with celestial phenomena themselves and with the reckoning of time, which was directly based on the observation of these phenomena. That the victory of the decimal principle was due merely to the practical necessity of choosing the principle that was simplest and most convenient, is shown by the fact that ten was never a sacred number, as was twelve. It has a purely terrestrial and human origin. In the field of the practical necessities of life, man was victorious over the gods. Perhaps, therefore, the organization of society on the decimal principle reflects also the triumph of the secular State over theocracy. The decimal principle likewise exercised a certain influence upon the division of time, and it is surely not accidental that such influence coincides with epochs that are strongly