1. Labor is any human effort having an aim or purpose outside of itself. It is difficult to define satisfactorily the term labor. No definition will quite mark off all the cases. The efforts put forth by men may be classified according as they are pleasant in themselves, and according as they have separable useful results. These two factors combine to form four groups of actions.

Work and play defined and distinguished.

The fourth combination is not found in rational life, for no motive exists to do a painful act for a useless result. Let us consider the other three.

The first group comprises most of the sports, games, and pastimes found in every land and time. In the mere putting forth of the powers of mind and muscle there is a joy felt by children and men of all races, and this is heightened by companionship, emulation, and even by a spice of danger.

Play.

Play is not dependent on a useful objective result later to be enjoyed, but, like beauty, is its own excuse for being. The tired student goes out-of-doors to bat the tennis-ball, making no change in the material world, except to wear out his shoes and to lose the ball, but finding that hour rich in the joy of life. If properly chosen, play strengthens and vivifies both soul and body, leaving an afterglow of health and happiness. The choice of sports and temperance in their pursuit are among the surest tests of wisdom in men and in societies. A love of vigorous play no less than the power of sustained work, marks the dominant and progressive peoples of the earth.

Labor as pleasure.

Acts in the second group give pleasure and at the same time leave an objective result. The hunter gets more pleasure if he returns with well-filled bags of game, but the distinction between the sportsman and the "pot-hunter" is not hard to find. The one has his joy in the sport, the other in the material results of the sport. This kind of action presents some puzzling cases, but in general must be classed as labor, since labor is to be judged by the objective economic results rather than by the pleasure of the act itself.

Labor as sacrifice.

In a third class are the acts that are painful in themselves, that are done unwillingly, but that leave a pleasurable result. Unfortunately a large part of the actions of men are of this class, which to most minds is the typical labor.

Joy in work is the ideal.

There is thus labor that is pleasurable in itself and labor that is painful though it leads to a desirable result. The social ideal clearly is that all human labor should be made pleasurable. Social dreamers love to picture a day when all shall find for effort a full reward in the mere doing, - the reward of the artist, of the scholar, of the saint, in addition to the objective result in economic wealth. Probably we are slowly nearing this ideal. Not only in the professions and in the esthetic arts, but in commerce, in mechanics, and in the humblest walks of life are found men free from envy, ejoicing in their daily tasks. Such is the normal feeling of the healthy optimist. And yet in every serious occupation there are numberless moments and occasions when the spirit flags and only hard necessity holds men to their tasks. The dilettante does not go far or long or steadily; the real tasks of the world are done by men that labor, now with joy, now wearily.

2. The agents of production compose two great species, material goods and human services. Our discussion of consumption goods, rent, and interest has been an analysis of the nature and uses of material goods. We now come to the other great species, human services, which comprise those acts of men (one's own or other's) that minister to the gratification of wants. There are also misdirected efforts, and evil deeds which are "disutilities" to all but the doer.

The distinction between men and things is fundamental in modern economic discussion where each man is looked upon as free. It is not so clear where slavery exists and the master looks in the same way upon the services of his cattle, of his chattel slaves, and of his land. Even in the freest society, man's services are compared purely as to their utility, with the uses of other parts of the material world. It is said that the price of mules at the Pennsylvania mines has been affected by immigration, because a man and a mule sometimes represent interchangeable services. But in the study of political economy the distinction between men and other material things must never be lost sight of; they are the two fundamental classes of economic agents, the one being solely a means to an end, the other being an end in itself.

The distinction between men and things.

3. Labor and material wealth are complementary and indispensable to each other in most of their uses. The discussion of material wealth and its value apart from the subject of labor, of the problem of rent and interest apart from that of wages, does not imply that this material wealth would have the same value in real life if labor were absent. As one field affects the value of another field, and one good, by substitution, the value of another good, so does labor affect material wealth. Some material wealth can be used apart from labor, but most of it must be used in combination with some labor. Rent, therefore, is not determined in concrete cases apart from men and their services. It is allowable, however, in abstract analysis, to simplify the question by leaving out a difficult complication, and thus to set forth more clearly the logical bearing and effect of a certain factor.

Rent and wages mutually affect each other.

Certain shares of the product are logically attributed to each.

Each of two kinds of agents used together affects the utility of the other, and the value of the product. If neither can be credited with the whole value, how is any distribution to be made between them? It is not possible to measure their technical services in the product, but it usually is possible to gage their marginal utility under particular conditions. Flour, water, and labor are needed to make biscuits; out water being a free agent, does not enter into the combination with any marginal utility. A match also is almost indispensable to start the fire (and who has not seen the time when he would give far more for a match than for a bucket of coal), but as things usually are, the match is credited with a value of a very small fraction of a cent. Again, how is to be measured the economic service of the tree and of the labor needed for gathering its fruits? There is here suggested the superficial aspect of what is known as the problem of complementary values. Where two or more things are indispensable to a product, how much shall be credited to each?

Labor gratifies directly and indirectly.

4. Human service has the same general relation to wants that material goods have, affording gratification either directly or indirectly. It is axiomatic that to be "economic goods" human efforts like material goods must afford utilities whose importance is felt. Many services give pleasure directly and are immediately consumed. A tropical potentate has an attendant to fan him, and another to carry an umbrella; a humble citizen is shaved, doctored, sung to, and played for. The gratification in such cases is directly produced in personal comfort, in the consciousness of heightened beauty, in the feeling of self-esteem. Value is thus created and consumed immediately, taking no material form apart from the consumer.

But the results of most human services may be seen to rest, at least temporarily, in some material form. Effort is put upon a material thing to be used later. The work of the waiter in spreading and arranging the table is not an immediate service, for it is embodied in material form an hour or two before the meal. The service of cook no less than that of gardener and butcher, is put into material form before it comes to the consumer. The woodman fells, cuts up and splits a tree, and piles it at the door, putting his labor into a utility to be consumed months afterward. The old economists used to class labor as productive and unproductive according as it was or was not embodied in material form. The classing of the services of cook, waiter, valet, etc., as unproductive seems, even from the old point of view, to have been inconsistent, and the attempt to distinguish services by any such test is now wholly given up. Whether the service rests in material form for a week, a month, a year, or as often happens, for a much longer period, is not essential. [The test of the productiveness of services is not their embodiment in material form, but their appearance as psychic income, their ministry to wants. The most varied kinds of human activity may be unified by this thought in the concept of economic labor.

Labor embodied for a time in material form.