But the corresponding taboo restriction consists in the prohibition against members of the same clan marrying each other or having any kind of sexual intercourse whatsoever with each other. This is the famous and enigmatic _exogamy_ connexion with totemism. We have devoted the whole first chapter of this book to it, and therefore need only mention here that this exogamy springs from the intensified incest dread of primitive races, that it becomes entirely comprehensible as a security against incest in group marriages, and that at first it accomplishes the avoidance of incest for the younger generation and only in the course of further development becomes a hindrance to the older generation as well[142]. To this presentation of totemism by Frazer, one of the earliest in the literature on the subject, I will now add a few excerpts from one of the latest summaries. In the _Elements of the Psychology of Races_, which appeared in 1912, W. Wundt says[143]: “The totem animal is considered the ancestral animal. ‘Totem’ is therefore both a group name and a birth name and in the latter aspect this name has at the same time a mythological meaning. But all these uses of the conception play into each other and the particular meanings may recede so that in some cases the totems have become almost a mere nomenclature of the tribal divisions, while in others the idea of the descent or else the cultic meaning of the totem remains in the foreground.... The conception of the totem determines the _tribal_ arrangement and the _tribal organization_. These norms and their establishment in the belief and feelings of the members of the tribe account for the fact that originally the totem animal was certainly not considered merely a name for a group division but that it usually was considered the progenitor of the corresponding division.... This accounted for the fact that these animal ancestors enjoyed a cult.... This animal cult expresses itself primarily in the attitude towards the totem animal, quite aside from special ceremonies and ceremonial festivities: not only each individual animal but every representative of the same species was to a certain degree a sanctified animal; the member of the totem was forbidden to eat the flesh of the totem animal or he was allowed to eat it only under special circumstances. This is in accord with the significant contradictory phenomenon found in this connexion, namely, that under certain conditions there was a kind of ceremonial consumption of the totem flesh....” “ ...But the most important social side of this totemic tribal arrangement consists in the fact that it was connected with certain rules of conduct for the relations of the groups with each other. The most important of these were the rules of conjugal relations. This tribal division is thus connected with an important phenomenon which first made its appearance in the totemic age, namely with exogamy.”