(12) While most inventions at first draw capital from the social fund to the point where they are applied, many of them soon liberate capital by cheapening particular appliances of production, and nearly all of them, by means of the profits they insure, ultimately add to the social capital.

The Vital Importance of Continued Improvement.—Intelligent study will make it clear to every one that any assertion that machinery is the enemy of labor is not merely erroneous, it is a contradiction of the most striking and important fact connected with general progress. The gains of labor during the past century, which have been partly due to the occupation of areas of new land, have been largely due to the mechanical inventions and technical discoveries which have put the forces of nature so largely at man's disposal. These forces have worked for all society, indeed, but they have worked largely for the men who labor, whether in the factory, in the shop, on the railroad, or on the farm. Their effects are all-pervasive, since they signify an increase in the productive power of that final unit of social labor on which wages generally depend. General riches have been and must continue to be generally beneficent. As an isolated man working, Crusoe-like, for himself alone, gains by every technical discovery he can make and by everything he can add to his stock of productive appliances, so society, the great and isolated organism which is the tenant of our planet, reaps a benefit by every improvement it can make, and the forces of distribution see to it that this benefit is carried through and through the system and made to improve the condition of the most humble members. Since the great areas of new land are no longer available as a future resource, the hope of labor during the coming centuries, under any form of industrial organization, whether it be competitive or socialistic, rests on the prospect of continued technical gains,—an unending succession of calls on the exhaustless serving power of nature.

The Effect of Changes in the Relative Amounts of Labor and Capital.—The law of wages, as stated in an early chapter of this work, makes it evident that an increase of population, while the social fund of capital remains the same, would reduce the product of marginal labor and therefore the rate of wages. In every establishment into which more workmen should come, while its capital remained the same in amount, the power of an individual worker to produce goods would be lessened. Moreover, any influx of laborers into the society as a whole would be attended by a diffusion of them among all the groups and subgroups, so that the power of an individual laborer to create any kind of goods would be reduced. This means that labor has lost some of its power to create commodity, which is the concrete name for general wealth, and its wages fall accordingly.

An influx of capital without any change in the number of laborers would have the opposite effect. It would add to the productive power of marginal labor. As the new capital should diffuse itself through the producing organism it would enlarge the product of workers everywhere. The wages of labor depend in part on a numerical ratio between units of capital and units of labor, as they coöperate in production; and the change in the ratio which enlarging capital causes improves the condition of the working people. The capital also diffuses itself throughout the system, every subgroup gets a share of it, and labor everywhere responds to this influence and produces more than before. In a change in this ratio—in a gain of per capita wealth in productive forms—lies one influence which has a great power over human destiny and is one main cause of weal or woe for coming generations. Method as it improves is related in two ways to this critical change in the ratio of capital to population. It is a prominent cause of the increase of capital. What men make by juggling with values and putting taxes on other men adds nothing to the aggregate wealth; but what they make by improved methods of production causes a net addition to it. The improvement in method also directly reënforces the influence of enlarging capital, by infusing productivity into labor and increasing its returns.

The Resultant of the Five Dynamic Changes acting Together.—So long as the increase of capital more than offsets the increase of population, the ultimate result of all five of the general changes which characterize a dynamic state is to increase the well-being of laborers. The movement of labor from point to point in the system of industrial groups is a necessary means of securing the largest gain for society as a whole and of diffusing the benefit among all members. It is wage earners who are most numerous and most needy, and the greatest benefit which can be credited to any economic influence is that which takes the shape of a rise in wages. Moreover, an upward trend in the rate of pay is of far greater importance than the level of the rate at any one time. A system that should afford high present wages would stand condemned if it precluded all chance of higher ones hereafter; while a system that should begin with a low rate and afford a guaranty that it should grow higher each year to the end of time would have the most important merit which any system could possess. The outlook it would afford for humanity would far outweigh a measure of hardship imposed on the present generation. A present purgatory with dynamic capabilities must in the end excel any earthly paradise which is held fast in a stationary state.

We may represent the resultant of the actual growth of population and of capital by the following figure:—

Measuring time by decades along the horizontal base line and the rate of wages at the beginning of a century by the line AB, we represent the increase in the pay of labor which would be brought about by an increase of capital not counteracted by any other influence by the dotted line BC, and the reduction which would be caused by an increase of population by the dotted line BE. The line BD describes the resultant effect of these two changes acting together, on the supposition that during the latter part of the century the growth of population is somewhat retarded and that the increase of capital is the predominating influence.

We may further represent the change in the rate of wages which is caused by improvements in method and organization by lines rising above the one which expresses the trend of wages as it is affected only by an increase of capital and of population.