[4] A physiological conception of society, or of the community, had been employed before,--_e.g._, by the Physiocrats,--and such a concept was reached also by English speculators--_e.g._, Herbert Spencer--during Roscher's lifetime; but these physiological conceptions of society are reached by a different line of approach from that which led up to the late-Hegelian physiological or biological conception of human culture as a spiritual structure and process. The outcome is also a different one, both as regards the use made of the analogy and as regards the theoretical results reached by its aid. It may be remarked, by the way, that neo-Hegelianism, of the "Left," likewise gave rise to a theory of a self-determining cultural exfoliation; namely, the so-called "Materialistic Conception of History" of the Marxian socialists. This Marxian conception, too, had much of a physiological air; but Marx and his coadjutors had an advantage over Roscher and his following, in that they were to a greater extent schooled in the Hegelian philosophy, instead of being uncritical receptacles of the Romantic commonplaces left by Hegelianism as a residue in popular thought. They were therefore more fully conscious of the bearing of their postulates and less naive in their assumptions of self-sufficiency. [5] _E.g._, in his controversy with Treitschke. See _Grundfragen der Socialpolitik und der Volkswirtschaftslehre_, particularly pp. 24, 25. [6] _E.g._, _Grundriss_, pp. 225, 409, 411. INDUSTRIAL AND PECUNIARY EMPLOYMENTS[1] For purposes of economic theory, the various activities of men and things about which economists busy themselves were classified by the early writers according to a scheme which has remained substantially unchanged, if not unquestioned, since their time. This scheme is the classical three-fold division of the factors of production under Land, Labor, and Capital. The theoretical aim of the economists in discussing these factors and the activities for which they stand has not remained the same throughout the course of economic discussion, and the three-fold division has not always lent itself with facility to new points of view and new purposes of theory, but the writers who have shaped later theory have, on the whole, not laid violent hands on the sacred formula. These facts must inspire the utmost reserve and circumspection in any one who is moved to propose even a subsidiary distinction of another kind between economic activities or agents. The terminology and the conceptual furniture of economics are complex and parti-colored enough without gratuitous innovation.