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Rh when more data are available. Again, the choice of topics has been governed by the importance of the problems involved. Thus, so far, no very important problems have been found in war customs, population, etc., but in forms of social organization, certain industries, art, etc., we do find problems that bear upon the very fundamentals of anthropology. In the preparation of this volume our ideal has been to treat these fundamental problems rather than to present a digest of all possible phases of New World native life.