# Principles of Political Economy (J.S. Mill, 1871), vol. 2/Book IV, Chapter II

This is the seventh edition of the Principles, which was first published 1848.
CHAPTER II.
INFLUENCE OF THE PROGRESS OF INDUSTRY AND POPU- LATION ON VALUES AND PRICES.
§ 1.The changes which the progress of industry causes or presupposes in the circumstances of production, are necessarily attended with changes in the values of commodities.
The permanent values of all things which are neither under a natural nor under an artificial monopoly, depend, as we have seen, on their cost of production. But the increasing power which mankind are constantly acquiring over nature, increases more and more the efficiency of human exertion, or in other words, diminishes cost of production. All inventions by which a greater quantity of any commodity can be produced with the same labour, or the same quantity with less labour, or which abridge the process, so that the capital employed needs not be advanced for so long a time, lessen the cost of production of the commodity. As, however, value is relative; if inventions and improvements in production were made in all commodities, and all in the same degree, there would be no alteration in values. Things would continue to exchange for each other at the same rates as before; and mankind would obtain a greater quantity of all things in return for their labour and abstinence, without having that greater abundance measured and declared (as it is when it affects only one thing) by the diminished exchange value of the commodity.
As for prices, in these circumstances they would be affected or not, according as the improvements in production did or did not extend to the precious metals. If the materials of money were an exception to the general diminution of cost of production, the values of all other things would ​fall in relation to money, that is, there would he a fall of general prices throughout the world. But if money, like other things, and in the same degree as other things, were obtained in greater abundance and cheapness, prices would be no more affected than values would: and there would be no visible sign in the state of the markets, of any of the changes which had taken place; except that there would be (if people continued to labour as much as before) a greater quantity of all sorts of commodities, circulated at the same prices by a greater quantity of money.
Improvements in production are not the only circumstance accompanying the progress of industry, which tends to diminish the cost of producing, or at least of obtaining, commodities. Another circumstance is the increase of intercourse between different parts of the world. As commerce extends, and the ignorant attempts to restrain it by tariffs become obsolete, commodities tend more and more to be produced in the places in which their production can be carried on at the least expense of labour and capital to mankind. As civilization spreads, and security of person and property becomes established, in parts of the world which have not hitherto had that advantage, the productive capabilities of those places are called into fuller activity, for the benefit both of their own inhabitants and of foreigners. The ignorance and misgovernment in which many of the regions most favoured by nature are still grovelling, afford work, probably, for many generations before those countries will be raised even to the present level of the most civilized parts of Europe. Much will also depend on the increasing migration of labour and capital to unoccupied parts of the earth, of which the soil, climate, and situation are found, by the ample means of exploration now possessed, to promise not only a large return to industry, but great facilities of producing commodities suited to the markets of old countries. Much as the collective industry of the earth is likely to be increased in efficiency by the extension of science and of the industrial ​arts, a still more active source of increased cheapness of production will be found, probably, for some time to come, in the gradually unfolding consequences of Free Trade, and in the increasing scale on which Emigration and Colonization will be carried on.
From the causes now enumerated, unless counteracted by others, the progress of things enables a country to obtain at less and less of real cost, not only its own productions but those of foreign countries. Indeed, whatever diminishes the cost of its own productions, when of an exportable character, enables it, as we have already seen, to obtain its imports at less real cost.
§ 2.But is it the fact, that these tendencies are not counteracted? Has the progress of wealth and industry no effect in regard to cost of production, but to diminish it? Are no causes of an opposite character brought into operation by the same progress, sufficient in some cases not only to neutralize, but to overcome the former, and convert the descending movement of cost of production into an ascending movement? We are already aware that there are such causes, and that, in the case of the most important classes of commodities, food and materials, there is a tendency diametrically opposite to that of which we have been speaking. The cost of production of these commodities tends to increase.
This is not a property inherent in the commodities themselves. If population were stationary, and the produce of the earth never needed to be augmented in quantity, there would be no cause for greater cost of production. Mankind would, on the contrary, have the full benefit of all improvements in agriculture, or in the arts subsidiary to it, and there would be no difference, in this respect, between the products of agriculture and those of manufactures. The only products of industry, which, if population did not increase, would be liable to a real increase of cost of production, are those which, depending on a material which is not renewed, are either ​wholly or partially exhaustible; such as coal, and most if not all metals; for even iron, the most abundant as well as most useful of metallic products, which forms an ingredient of most minerals and of almost all rocks, is susceptible of exhaustion so far as regards its richest and most tractable ores.
When, however, population increases, as it has never yet failed to do when the increase of industry and of the means of subsistence made room for it, the demand for most of the productions of the earth, and particularly for food, increases in a corresponding proportion. And then comes into effect that fundamental law of production from the soil, on which we have so frequently had occasion to expatiate; the law, that increased labour, in any given state of agricultural skill, is attended with a less than proportional increase of produce. The cost of production of the fruits of the earth increases, cæteris paribus, with every increase of the demand.
No tendency of a like kind exists with respect to manufactured articles. The tendency is in the contrary direction. The larger the scale on which manufacturing operations are carried on, the more cheaply they can in general be performed. Mr. Senior has gone the length of enunciating as an inherent law of manufacturing industry, that in it increased production takes place at a smaller cost, while in agricultural industry increased production takes place at a greater cost. I cannot think, however, that even in manufactures, increased cheapness follows increased production by anything amounting to a law. It is a probable and usual, but not a necessary, consequence.
As manufactures, however, depend for their materials either upon agriculture, or mining, or the spontaneous produce of the earth, manufacturing industry is subject, in respect of one of its essentials, to the same law as agriculture. But the crude material generally forms so small a portion of the total cost, that any tendency which may exist to a progressive increase in that single item, is much over-balanced by the diminution continually taking place in all the other elements; ​to which diminution it is impossible at present to assign any limit.
The tendency, then, being to a perpetual increase of the productive power of labour in manufactures, while in agriculture and mining there is a conflict between two tendencies, the one towards an increase of productive power, the other towards a diminution of it, the cost of production being lessened by every improvement in the processes, and augmented by every addition to population; it follows that the exchange values of manufactured articles, compared with the products of agriculture and of mines, have, as population and industry advance, a certain and decided tendency to fall. Money being a product of mines, it may also be laid down as a rule, that manufactured articles tend, as society advances, to fall in money price. The industrial history of modern nations, especially during the last hundred years, fully bears out this assertion.
§ 3.Whether agricultural produce increases in absolute as well as comparative cost of production, depends on the conflict of the two antagonist agencies, increase of population, and improvement in agricultural skill. In some, perhaps in most, states of society, (looking at the whole surface of the earth,) both agricultural skill and population are either stationary, or increase very slowly, and the cost of production of food, therefore, is nearly stationary. In a society which is advancing in wealth, population generally increases faster than agricultural skill, and food consequently tends to become more costly; but there are times when a strong impulse sets in towards agricultural improvement. Such an impulse has shown itself in Great Britain during the last twenty or thirty years. In England and Scotland agricultural skill has of late increased considerably faster than population, insomuch that food and other agricultural produce, notwithstanding the increase of people, can be grown at less cost than they were thirty years ago: and the abolition of the Corn Laws ​has given an additional stimulus to the spirit of improvement In some other countries, and particularly in France, the improvement of agriculture gains ground still more decidedly upon population, because though agriculture, except in a few provinces, advances slowly, population advances still more slowly, and even with increasing slowness; its growth being kept down, not by poverty, which is diminishing, but by prudence.
Which of the two conflicting agencies is gaining upon the other at any particular time, might be conjectured with tolerable accuracy from the money price of agricultural produce (supposing bullion not to vary materially in value), provided a sufficient number of years could be taken, to form an average independent of the fluctuations of seasons. This, however, is hardly practicable, since Mr. Tooke has shown that even so long a period as half a century may include a much greater proportion of abundant and a smaller of deficient seasons than is properly due to it. A mere average, therefore, might lead to conclusions only the more misleading, for their deceptive semblance of accuracy. There would be less danger of error in taking the average of only a small number of years, and correcting it by a conjectural allowance for the character of the seasons, than in trusting to a longer average without any such correction. It is hardly necessary to add, that in founding conclusions on quoted prices, allowance must also be made as far as possible for any changes in the general exchange value of the precious metals.
§ 4.Thus far, of the effect of the progress of society on the permanent or average values and prices of commodities. It remains to be considered, in what manner the same progress affects their fluctuations. Concerning the answer to this ​question there can be no doubt. It tends in a very high degree to diminish them.
In poor and backward societies, as in the East, and in Europe during the Middle Ages, extraordinary differences in the price of the same commodity might exist in places not very distant from each other, because the want of roads and canals, the imperfection of marine navigation, and the insecurity of communications generally, prevented things from being transported from the places where they were cheap to those where they were dear. The things most liable to fluctuations in value, those directly influenced by the seasons, and especially food, were seldom carried to any great distances. Each locality depended, as a general rule, on its own produce and that of its immediate neighbourhood. In most years, accordingly, there was, in some part or other of any large country, a real dearth. Almost every season must be unpropitious to some among the many soils and climates to be found in an extensive tract of country; but as the same season is also in general more than ordinarily favourable to others, it is only occasionally that the aggregate produce of the whole country is deficient, and even then in a less degree than that of many separate portions; while a deficiency at all considerable, extending to the whole world, is a thing almost unknown. In modern times, therefore, there is only dearth, where there formerly would have been famine, and sufficiency everywhere when anciently there would have been scarcity in some places and superfluity in others.
The same change has taken place with respect to all other articles of commerce. The safety and cheapness of communications, which enable a deficiency in one place to be supplied from the surplus of another, at a moderate or even a small advance on the ordinary price, render the fluctuations of prices much less extreme than formerly. This effect is much promoted by the existence of large capitals, belonging to what are called speculative merchants, whose business it is to buy goods in order to resell them at a profit. ​These dealers naturally buying things when they are cheapest, and storing them up to be brought again into the market when the price has become unusually high; the tendency of their operations is to equalize price, or at least to moderate its inequalities. The prices of things are neither so much depressed at one time, nor so much raised at another, as they would be if speculative dealers did not exist.
Speculators, therefore, have a highly useful office in the economy of society; and (contrary to common opinion) the most useful portion of the class are those who speculate in commodities affected by the vicissitudes of seasons. If there were no corn-dealers, not only would the price of corn be liable to variations much more extreme than at present, but in a deficient season the necessary supplies might not be forthcoming at all. Unless there were speculators in corn, or unless, in default of dealers, the farmers became speculators, the price in a season of abundance would fall without any limit or check, except the wasteful consumption that would invariably follow. That any part of the surplus of one year remains to supply the deficiency of another, is owing either to farmers who withhold corn from the market, or to dealers who buy it when at the cheapest and lay it up in store.
§ 5.Among persons who have not much considered the subject, there is a notion that the gains of speculators are often made by causing an artificial scarcity; that they create a high price by their own purchases, and then profit by it. This may easily be shown to be fallacious. If a corn-dealer makes purchases on speculation, and produces a rise, when there is neither at the time nor afterwards any cause for a rise of price except his own proceedings; he no doubt appears to grow richer as long as his purchases continue, because he is a holder of an article which is quoted at a higher and higher price: but this apparent gain only seems within his reach so long as he does not attempt to realize it. If he has bought, for instance, a million of quarters, and by withholding them ​from the market, has raised the price ten shillings a quarter; just so much as the price has been raised by withdrawing a million quarters, will it be lowered by bringing them back, and the best that he can hope is that he will lose nothing except interest and his expenses. If by a gradual and cautious sale he is able to realize, on some portion of his stores, a part of the increased price, so also he will undoubtedly have had to pay a part of that price on some portion of his purchases. He runs considerable risk of incurring a still greater loss; for the temporary high price is very likely to have tempted others, who had no share in causing it, and who might otherwise not have found their way to his market at all, to bring their corn there, and intercept a part of the advantage. So that instead of profiting by a scarcity caused by himself, he is by no means unlikely, after buying in an average market, to be forced to sell in a superabundant one.
As an individual speculator cannot gain by a rise of price solely of his own creating, so neither can a number of speculators gain collectively by a rise which their operations have artificially produced. Some among a number of speculators may gain, by superior judgment or good fortune in selecting the time for realizing, but they make this gain at the expense, not of the consumer, but of the other speculators who are less judicious. They, in fact, convert to their own benefit the high price produced by the speculations of the others, leaving to these the loss resulting from the recoil. It is not to be denied, therefore, that speculators may enrich themselves by other people's loss. But it is by the losses of other speculators. As much must have been lost by one set of dealers as is gained by another set.
When a speculation in a commodity proves profitable to the speculators as a body, it is because, in the interval between their buying and reselling, the price rises from some cause independent of them, their only connexion with it consisting in having foreseen it. In this case, their purchases make the price begin to rise sooner than it otherwise would do, thus ​spreading the privation of the consumers over a longer period, but mitigating it at the time of its greatest height: evidently to the general advantage. In this, however, it is assumed that they have not overrated the rise which they looked forward to. For it often happens that speculative purchases are made in the expectation of some increase of demand, or deficiency of supply, which after all does not occur, or not to the extent which the speculator expected. In that case the speculation, instead of moderating fluctuation, has caused a fluctuation of price which otherwise would not have happened, or aggravated one which would. But in that case, the speculation is a losing one, to the speculators collectively, however much some individuals may gain by it. All that part of the rise of price by which it exceeds what there are independent grounds for, cannot give to the speculators as a body any benefit, since the price is as much depressed by their sales as it was raised by their purchases; and while they gain nothing by it, they lose, not only their trouble and expenses, but almost always much more, through the effects incident to the artificial rise of price, in checking consumption, and bringing forward supplies from unforeseen quarters. The operations, therefore, of speculative dealers, are useful to the public whenever profitable to themselves; and though they are sometimes injurious to the public, by heightening the fluctuations which their more usual office is to alleviate, yet whenever this happens the speculators are the greatest losers. The interest, in short, of the speculators as a body, coincides with the interest of the public; and as they can only fail to serve the public interest in proportion as they miss their own, the best way to promote the one is to leave them to pursue the other in perfect freedom.
I do not deny that speculators may aggravate a local scarcity. In collecting corn from the villages to supply the towns, they make the dearth penetrate into nooks and corners which might otherwise have escaped from bearing their share of it. To buy and resell in the same place, tends to alleviate ​scarcity; to buy in one place and resell in another, may increase it in the former of the two places, hut relieves it in the latter, where the price is higher, and which, therefore, by the very supposition, is likely to be suffering more. And these sufferings always fall hardest on the poorest consumers, since the rich, by outbidding, can obtain their accustomed supply undiminished if they choose. To no persons, therefore, are the operations of corn-dealers on the whole so beneficial as to the poor. Accidentally and exceptionally, the poor may suffer from them: it might sometimes be more advantageous to the rural poor to have corn cheap in winter, when they are entirely dependent on it, even if the consequence were a dearth in spring, when they can perhaps obtain partial substitutes. But there are no substitutes, procurable at that season, which serve in any great degree to replace bread-corn as the chief article of food: if there were, its price would fall in the spring, instead of continuing, as it always does, to rise till the approach of harvest.
There is an opposition of immediate interest, at the moment of sale, between the dealer in corn and the consumer, as there always is between the seller and the buyer: and a time of dearth being that in which the speculator makes bis largest profits, he is an object of dislike and jealousy at that time, to those who are suffering while he is gaining. It is an error, however, to suppose that the corn-dealer's business affords him any extraordinary profit: he makes his gains not constantly, but at particular times, and they must therefore occasionally be great, but the chances of profit in a business in which there is so much competition, cannot on the whole be greater than in other employments. A year of scarcity, in which great gains are made by corn-dealers, rarely comes to an end without a recoil which places many of them in the list of bankrupts. There have been few more promising seasons for corn-dealers than the year 1847, and seldom was there a greater break-up among the speculators than in the autumn of that year. The chances of ​failure, in this most precarious trade, are a set off against great occasional profits. If the corn-dealer were to sell his stores, during a dearth, at a lower price than that which the competition of the consumers assigns to him, he would make a sacrifice, to charity or philanthropy, of the fair profits of his employment, which may he quite as reasonably required from any other person of equal means. His business being a useful one, it is the interest of the public that the ordinary motives should exist for carrying it on, and that neither law nor opinion should prevent an operation beneficial to the public from being attended with as much private advantage as is compatible with full and free competition.
It appears, then, that the fluctuations of values and prices arising from variations of supply, or from alterations in real (as distinguished from speculative) demand, may be expected to become more moderate as society advances. With regard to those which arise from miscalculation, and especially from the alternations of undue expansion and excessive contraction of credit, which occupy so conspicuous a place among commercial phenomena, the same thing cannot be affirmed with equal confidence. Such vicissitudes, beginning with irrational speculation and ending with a commercial crisis, have not hitherto become either less frequent or less violent with the growth of capital and extension of industry. Rather they may be said to have become more so: in consequence, as is often said, of increased competition; but, as I prefer to say, of a low rate of profits and interest, which makes capitalists dissatisfied with the ordinary course of safe mercantile gains. The connexion of this low rate of profit with the advance of population and accumulation, is one of the points to be illustrated in the ensuing chapters.