Werner Sombart,
Socialism and the Social Movement in the 19th Century
“ To this we answer in brief: modern society presents itself to us as an artificial medley of numerous social classes—that is, of certain [107] groups of persons whose homogeneity arises out of their attachment to specific forms or spheres of economic life. We distinguish the "junker," as representative of feudal agrarianism, from the bourgeoisie, the representatives of capital; we distinguish the "middle class," the representatives of local production and distribution, from the modern wage-worker or the proletariat, etc. ”
