These clans, as we see, separated strictly according to totems. The bond of cult association had now become so strong that all members of a particular totem regularly affiliated themselves with the same clan, though the grouping of the totem divisions within the clans of the two tribal halves proceeded along absolutely independent lines, as may be concluded from the fact that the totems composing the clans within the two tribal divisions are grouped differently. The formation of such cult or totem groups, thus, may already have begun in the primitive horde. At that time, however, these cult groups were probably loosely knit, so that when the horde split up, its members separated, each of the two tribal divisions, generally speaking, including individuals of all the various tribes. Not so in the case of those divisions of the tribe which originated later, after mankind had advanced further beyond the condition of the horde. By this time the totem unions must have become stronger, so that the members of a cult group no longer separated but, together with other similar groups, formed a clan. When the growth of the tribe, together with the conditions of food supply and the density of population, led to a separation of the tribe, certain totem groups invariably joined one division and others, the other, but the more firmly organized groups remained intact. A further phenomenon of great importance for the development of exogamous marriage laws must here be mentioned--one that occurs throughout the entire realm of totemic culture but is particularly prominent among the Australian totem groups. This phenomenon consists in _totem friendships_. Certain totem groups regard themselves as in particularly close relations with certain other groups. Friendships similar to these, in a general way, are to be found even in connection with the highest forms of political organization. For modern States themselves enter into political alliances or friendships, and these, as is well known, are subject to change. Such alliances occur from the beginnings of totemism on up to the advanced plane of modern international culture. Though these affiliations eventually come to be determined primarily by the commercial relations of peoples, the determining factors at the outset were faith and cult. In both cases, however, the friendships are not of a personal nature, but are relations based on common interests. This common interest may consist, for example, in the fact that, as has been observed among some of the Australian totem alliances, the member of a totem may slay the totem animal in the hunt, but may not eat of it, though the member of the friendly totem may do so. Thus, the interest in cult becomes also a means for the satisfaction of wants, as well as a bond that unites more closely the particular totem groups.