Now in both these cases, where we have apparently penetrated to the most primitive conditions, we are also brought up abruptly against conditions which are not primitive, namely, the exogamous class system, and we are bound to conclude that this class system thus shows itself to be an intruding force which has not, however, been strong enough to quite obliterate the older forces of hostile marriage-capture and mother-right society. Our next quest is therefore to find out, if we can, an explanation of these two contrasted elements in Australian totemic society, and for this purpose it is advisable to still further narrow down the range of inquiry to one special section of the Australian peoples. For this purpose I shall take the Arunta. There has been much controversy about this people. Mr. Lang argues that the presence of exogamous classes and male descent shows the Arunta to be more advanced than other Australian peoples;[371] Messrs. Spencer and Gillen that the survival of totem beliefs, which are local and unconnected with the class system, proves them to be the least advanced. In this country Mr. Hartland and Mr. Thomas side with Mr. Lang; Mr. Frazer with Messrs. Spencer and Gillen. The first point of importance to note about the Arunta people is that they occupy the least favourable districts for food supply.[372] This means that they have been pushed there. They did not choose such a location--in other words, they are among the last units of the migration movements which peopled Australia; they are among the last people to have become stationary as a group, and to have been compelled to resort to the development of social organisation in lieu of constantly swarming off from the centre or from the last stopping place to the ends. This tells for primitive, not advanced, conditions.