the totem a must limit his marriage choice to the woman of the totems 4, 5, 6.
The historical relations of the marriage classes—of which there are found as many as eight in some tribes—are quite unexplained. We only see that these arrangements seek to attain the same object as the totem exogamy, and even strive for more. But whereas the totem exogamy makes the impression of a sacred statute which sprang into existence, no one knows how, and is therefore a custom, the complicated institutions of the marriage classes, with their subdivisions and the conditions attached to them, seem to spring from legislation with a definite aim in view. They have perhaps taken up afresh the task of incest prohibition because the influence of the totem was on the wane. And while the totem system is, as we know, the basis of all other social obligations and moral restrictions of the tribe, the importance of the phratries generally ceases when the regulation of the marriage choice at which they aimed has been accomplished.
In the further development of the classification of the marriage system there seems to be a tendency to go beyond the prevention of natural and group incest, and to prohibit marriage between more distant group relations, in a manner similar to the Catholic church, which extended