Thus, all these phenomena, belonging in part to the transitional stage between monogamy and polygamy and in part to a combination of the two forms of polygamy, namely, polygyny and polyandry, point to monogamy as the basal form of marriage, and that form from which, under the influence of particular conditions, all others have developed. Whether or not we regard it as probable that the system of maternal descent was at one time universal, no argument for the existence of an original promiscuity can be based upon it. If we call to mind the close association of the youths and men of the kinship group in the men's house, it will be apparent that such conditions of social intercourse make for a particularly intimate bond between mother and children. Before his entrance into the community of men, the boy lives in the company of the women. This close association between mother and children is sufficient to account for the origin of maternal descent. But, owing to the gradual change of cultural conditions, it is to be expected that maternal descent should pass over into paternal descent as soon as more positive conceptions of authority and property are formed. Moreover, the possibility also remains that among some tribes paternal descent prevailed from the very outset; positive proof is here not available. We cannot, of course, deny the possibility that under certain cultural conditions man exercised the decisive influence from the very beginning, as early, indeed, as one may speak of clan membership and hereditary succession. The most primitive stage of culture, as we shall see in the following discussion, lacks the conditions for either maternal or paternal descent, inasmuch as it possesses neither clearly defined clans nor any personal property worth mention. Thus, the arguments based on the existing conditions of primitive peoples, and contending that the original condition of mankind was that of a horde in which both marriage and the family were lacking, are untenable. On the contrary, the phenomena, both of group-marriage, valued as the most important link in the chain of proof, and of the simpler forms of polygamy, everywhere point to _monogamy_ as their basis. Furthermore, these arguments all rest on the assumption that the peoples among whom these various phenomena occur, particularly the combination of polygyny and polyandry in group-marriage, occupy a primitive plane of social organization. This presupposition also has proven fallacious, since it has become evident that this organization, especially among the Australian tribes, is an extremely complicated one, and points back to a long history involving many changes of custom.