This distinction has but little obvious significance in a modern industrial community, and it has, therefore, received but slight attention at the hands of economic writers. When viewed in the light of that modern common sense which has guided economic discussion, it seems formal and insubstantial. But it persists with great tenacity as a commonplace preconception even in modern life, as is shown, for instance, by our habitual aversion to menial employments. It is a distinction of a personal kind -- of superiority and inferiority. In the earlier stages of culture, when the personal force of the individual counted more immediately and obviously in shaping the course of events, the element of exploit counted for more in the everyday scheme of life. Interest centred about this fact to a greater degree.
Consequently a distinction proceeding on this ground seemed more imperative and more definitive then than is the case to-day. As a fact in the sequence of development, therefore, the distinction is a substantial one and rests on sufficiently valid and cogent grounds.
The ground on which a discrimination between facts is habitually made changes as the interest from which the facts are habitually viewed changes. Those features of the facts at hand are salient and substantial upon which the dominant interest of the time throws its light. Any given ground of distinction will seem insubstantial to any one who habitually apprehends the facts in question from a different point of view and values them for a different purpose. The habit of distinguishing and classifying the various purposes and directions of activity prevails of necessity always and everywhere; for it is indispensable in reaching a working theory or scheme of life. The particular point of view, or the particular characteristic that is pitched upon as definitive in the classification of the facts of life depends upon the interest from which a discrimination of the facts is sought. The grounds of discrimination, and the norm of procedure in classifying the facts, therefore, progressively change as the growth of culture proceeds; for the end for which the facts of life are apprehended changes, and the point of view consequently changes also. So that what are recognised as the salient and decisive features of a class of activities or of a social class at one stage of culture will not retain the same relative importance for the purposes of classification at any subsequent stage.