There is still to be noted the statement of Roth, who reports the existence of class taboos which establish what we would call a division of consumption between the father, mother and children; each of these three parties belonging to a different class. That this statement is a result of careful and frequent and not merely casual observation, further, that this division of consumption plays an important part in the native family life, may be accepted as very probable. For the author, who is undoubtedly among our best, most exact and conscientious ethnographers, builds upon the rule in question a theory of the origin of classes. The whole class system has been devised by a process of natural selection, to regulate the proper distribution of the total quantity of food available.[950] And although we cannot enter here into the discussion whether this view be right or not, it may serve us as a guarantee that Roth had ascertained the great importance of the class taboo he describes and its prevalence over a wide area. For otherwise he would not have based such an important theory about one of the most crucial problems of ethnology on a single fact. Besides Roth's statement there is further the information of Wilhelmi about division of consumption within the family. [950] In a paper read before the Royal Society of Queensland, December 11, 1897, _Proc._, p. 10. Quoted by Frazer, _Tot. and Exog._, i. p. 137. Also in _Eth. Stud._, p. 69. At all events, although the evidence upon the division of consumption is rather scanty, the evidence about the division of labour is plentiful, and this latter may be regarded as one of the well-established features of Australian sociology.[951] The features of communism show us also that individual property in land has little economic meaning. If there is game, the privilege of hunting it is not an important one, since all members of the friendly group will partake of the results. To what was said regarding the unity of the family as an exclusive land owner (above, pp. 150 _sqq._), there is, therefore, nothing to be added.