and culture must have a foundation of menial labor, and that the only justification of such a situation is in the assumption that some are naturally fitted for the higher, and some for the lower, sphere.672 Such modern laborers are not technically slaves, but Aristotle would insist that they are in a still worse condition, since they are deprived of the humanizing and moralizing influences of a rational master. The plausibility of such a contention would be well illustrated by the wretched condition of multitudes of negroes after the Civil War, as also by the hopeless life of a large portion of the modern industrial army. Moreover, the economic slavery of many of the common toilers today is less justifiable than the domestic slavery advocated by Aristotle, for it too often means a life of indolence and self-indulgence for the masters, instead of that Greek leisure which gave opportunity for higher activity.673
MONEY
To the theory of money Aristotle makes a substantial contribution. He agrees with Plato that money found its origin in the growth of necessary exchange, which in turn resulted from an increased division of labor. Unlike Plato, however, he gives a detailed history