Life in a modern industrial community, or in other words life under the pecuniary culture, acts by a process of selection to develop and conserve a certain range of aptitudes and propensities. The present tendency of this selective process is not simply a reversion to a given, immutable ethnic type. It tends rather to a modification of human nature differing in some respects from any of the types or variants transmitted out of the past. The objective point of the evolution is not a single one. The temperament which the evolution acts to establish as normal differs from any one of the archaic variants of human nature in its greater stability of aim--greater singleness of purpose and greater persistence in effort. So far as concerns economic theory, the objective point of the selective process is on the whole single to this extent; although there are minor tendencies of considerable importance diverging from this line of development. But apart from this general trend the line of development is not single. As concerns economic theory, the development in other respects runs on two divergent lines. So far as regards the selective conservation of capacities or aptitudes in individuals, these two lines may be called the pecuniary and the industrial. As regards the conservation of propensities, spiritual attitude, or animus, the two may be called the invidious or self-regarding and the non-invidious or economical. As regards the intellectual or cognitive bent of the two directions of growth, the former may be characterized as the personal standpoint, of conation, qualitative relation, status, or worth; the latter as the impersonal standpoint, of sequence, quantitative relation, mechanical efficiency, or use.