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178 the more urgent became the necessity of arriving at an understanding of it and of casting light upon the riddle of its nature. To be sure, everything about totemism is in the nature of a riddle; the decisive questions are the origin of the totem, the motivation of exogamy (or rather of the incest taboo which it represents) and the relation between the two, the totem organization and the incest prohibition. The understanding should be at once historical and psychological; it should inform us under what conditions this peculiar institution developed and to what psychic needs of man it has given expression.

The reader will certainly be astonished to hear from how many different points of view the answer to these questions has been attempted and how far the opinions of expert investigators vary. Almost everything that might be asserted in general about totemism is doubtful; even the above statement of it, taken from an article by Frazer in 1887, cannot escape the criticism that it expresses an arbitrary preference of the author and would be challenged to-day by Frazer himself, who has repeatedly changed his view on the subject.