The South Mexican center similarly diffused its light through most of the northern continent. First its influences traveled to northern Mexico and the Southwest of the United States—Arizona and New Mexico, the seat of the Cliff-dwellers. There they took new root and then spread northward and eastward—altered, diluted, with much omitted. We may compare Mexico to a manufacturing district, where capital, inventiveness, resources and industry, flourish in mutual alliance; the Southwest to one of its outlets, a sort of distributing point or jobbing center, which imports, both for its own consumption and for re-export; the articles of trade in this case being elements of civilization—inventions, knowledge, arts.