SigPhi · David Ricardo

On the Principles of Political Economy and Taxation

Page 5 of 21

Now it is evident, that if out of these equal values, the farmer is at one time obliged to pay wages regulated by the price of wheat at 4_l._, and at other times at higher prices, the rate of his profits will diminish in proportion to the rise in the price of corn.

In this case, therefore, I think it is clearly demonstrated that a rise in the price of corn, which increases the money wages of the labourer, diminishes the money value of the farmer's profits.

But the case of the farmer of the old and better land will be in no way different; he also will have increased wages to pay, and will never retain more of the value of the produce, however high may be its price, than 720_l._ to be divided between himself and his always equal number of labourers; in proportion therefore as they get more, he must retain less.

When the price of corn was at 4_l._, the whole 180 quarters belonged to the cultivator, and he sold it for 720_l._ When corn rose to 4_l._ 4_s._ 8_d._ he was obliged to pay the value of ten quarters out of his 180 for rent, consequently the remaining 170 yielded him no more than 720_l._: when it rose further to 4_l._ 10_s._ he paid twenty quarters, or their value, for rent, and consequently only retained 160 quarters, which yielded the same sum of 720_l._ It will be seen then, that whatever rise may take place in the price of corn, in consequence of the necessity of employing more labour and capital to obtain a given additional quantity of produce, such rise will always be equalled in value by the additional rent, or additional labour employed; so that whether corn sells for 4_l._, 4_l._ 10_s._, or 5_l._ 2_s._ 10_d._, the farmer will obtain for that which remains to him, after paying rent, the same real value. Thus we see, that whether the produce belonging to the farmer be 180, 170, 160, or 150 quarters, he always obtains the same sum of 720_l._ for it; the price increasing in an inverse proportion to the quantity.

Rent then, it appears, always falls on the consumer, and never on the farmer; for if the produce of his farm should uniformly be 180 quarters, with the rise of price, he would retain the value of a less quantity for himself, and give the value of a larger quantity to his landlord; but the deduction would be such as to leave him always the same sum of 720_l._ It will be seen too that, in all cases, the same sum of 720_l._ must be divided between wages and profits. If the value of the raw produce from the land exceed this value, it belongs to rent, whatever may be its amount. If there be no excess, there will be no rent. Whether wages or profits rise or fall, it is this sum of 720_l._ from which they must both be provided. On the one hand, profits can never rise so high as to absorb so much of this 720_l._, that enough will not be left to furnish the labourers with absolute necessaries; on the other hand, wages can never rise so high as to leave no portion of this sum for profits.

Thus in every case, agricultural, as well as manufacturing profits are lowered by a rise in the price of raw produce, if it be accompanied by a rise of wages.[11] If the farmer gets no additional value for the corn which remains to him after paying rent, if the manufacturer gets no additional value for the goods which he manufactures, and if both are obliged to pay a greater value in wages, can any point be more clearly established than that profits must fall, with a rise of wages?

The farmer then, although he pays no part of his landlord's rent, that being always regulated by the price of produce, and invariably falling on the consumers, has however a very decided interest in keeping rent low, or rather in keeping the natural price of produce low. As a consumer of raw produce, and of those things into which raw produce enters as a component part, he will in common with all other consumers, be interested in keeping the price low. But he is most materially concerned with the high price of corn as it affects wages. With every rise in the price of corn, he will have to pay out of an equal and unvarying sum of 720_l._, an additional sum for wages to the ten men whom he is supposed constantly to employ. We have seen in treating on wages, that they invariably rise with the rise in the price of raw produce. On a basis assumed for the purpose of calculation, page 106, it will be seen that if when wheat is at 4_l._ per quarter, wages should be 24_l._ per annum.

Now, of the unvarying fund of 720_l._ to be distributed between labourers and farmers, And supposing that the original capital of the farmer was 3000_l._, the profits of his stock being in the first instance 480_l._, would be at the rate of 16 per cent. When his profits fell to 473_l._, they would be at the rate of 15.7 per cent.

But the _rate_ of profits will fall still more, because the capital of the farmer, it must be recollected, consists in a great measure of raw produce, such as his corn and hay-ricks, his unthreshed wheat and barley, his horses and cows, which would all rise in price in consequence of the rise of produce. His absolute profits would fall from 480_l._ to 445_l._ 15_s._; but if from the cause which I have just stated, his capital should rise from 3000_l._ to 3200_l._ the rate of his profits would, when corn was at 5_l._ 2_s._ 10_d._, be under 14 per cent.

If a manufacturer had also employed 3000_l._ in his business, he would be obliged in consequence of the rise of wages, to increase his capital, in order to be enabled to carry on the same business. If his commodities sold before for 720_l._, they would continue to sell at the same price; but the wages of labour, which were before 240_l._, would rise when corn was at 5_l._ 2_s._ 10_d._ to 274_l._ 5_s._ In the first case he would have a balance of 480_l._ as profit on 3000_l._, in the second he would have a profit only of 445_l._ 15_s._, on an increased capital, and therefore his profits would conform to the altered rate of those of the farmer.

There are few commodities which are not more or less affected in their price by the rise of raw produce, because some raw material from the land enters into the composition of most commodities. Cotton goods, linen, and cloth, will all rise in price with the rise of wheat; but they rise on account of the greater quantity of labour expended on the raw material from which they are made, and not because more was paid by the manufacturer to the labourers whom he employed on those commodities.

In all cases, commodities rise because more labour is expended on them, and not because the labour which is expended on them is at a higher value. Articles of jewellery, of iron, of plate, and of copper, would not rise, because none of the raw produce from the surface of the earth enters into their composition.

It may be said that I have taken it for granted, that money wages would rise with a rise in the price of raw produce, but that this is by no means a necessary consequence, as the labourer may be contented with fewer enjoyments. It is true that the wages of labour may previously have been at a high level, and that they may bear some reduction. If so, the fall of profits will be checked; but it is impossible to conceive that the money price of wages should fall, or remain stationary with a gradually increasing price of necessaries; and therefore it may be taken for granted that, under ordinary circumstances, no permanent rise takes place in the price of necessaries, without occasioning, or having been preceded by a rise in wages.

The effects produced on profits, would have been the same, or nearly the same, if there had been any rise in the price of those other necessaries, besides food, on which the wages of labour are expended. The necessity which the labourer would be under of paying an increased price for such necessaries, would oblige him to demand more wages; and whatever increases wages, necessarily reduces profits. But suppose the price of silks, velvets, furniture, and any other commodities, not required by the labourer, to rise in consequence of more labour being expended on them, would not that affect profits? certainly not: for nothing can affect profits but a rise in wages; silks and velvets are not consumed by the labourer, and therefore cannot raise wages.

It is to be understood that I am speaking of profits generally. I have already remarked that the market price of a commodity may exceed its natural or necessary price, as it may be produced in less abundance than the new demand for it requires. This however is but a temporary effect. The high profits on capital employed in producing that commodity will naturally attract capital to that trade; and as soon as the requisite funds are supplied, and the quantity of the commodity is duly increased, its price will fall, and the profits of the trade will conform to the general level. A fall in the general rate of profits is by no means incompatible with a partial rise of profits in particular employments. It is through the inequality of profits, that capital is moved from one employment to another. Whilst then general profits are falling, and gradually settling at a lower level in consequence of the rise of wages, and the increasing difficulty of supplying the increasing population with necessaries, the profits of the farmer, may, for an interval of some little duration, be above the former level. An extraordinary stimulus may be also given for a certain time, to a particular branch of foreign and colonial trade; but the admission of this fact by no means invalidates the theory, that profits depend on high or low wages, wages on the price of necessaries, and the price of necessaries chiefly on the price of food, because all other requisites may be increased almost without limit.

It should be recollected that prices always vary in the market, and in the first instance, through the comparative state of demand and supply. Although cloth could be furnished at 40_s._ per yard, and give the usual profits of stock, it may rise to 60 or 80_s._ from a general change of fashion, or from any other cause which should suddenly and unexpectedly increase the demand, or diminish the supply of it. The makers of cloth will for a time have unusual profits, but capital will naturally flow to that manufacture, till the supply and demand are again at their fair level, when the price of cloth will again sink to 40_s._, its natural or necessary price. In the same manner, with every increased demand for corn, it may rise so high as to afford more than the general profits to the farmer. If there be plenty of fertile land, the price of corn will again fall to its former standard, after the requisite quantity of capital has been employed in producing it, and profits will be as before; but if there be not plenty of fertile land, if, to produce this additional quantity, more than the usual quantity of capital and labour be required, corn will not fall to its former level. Its natural price will be raised, and the farmer, instead of obtaining permanently larger profits, will find himself obliged to be satisfied with the diminished rate which is the inevitable consequence of the rise of wages, produced by the rise of necessaries.

The natural tendency of profits then is to fall; for, in the progress of society and wealth, the additional quantity of food required is obtained by the sacrifice of more and more labour. This tendency, this gravitation as it were of profits, is happily checked at repeated intervals by the improvements in machinery, connected with the production of necessaries, as well as by discoveries in the science of agriculture which enable us to relinquish a portion of labour before required, and therefore to lower the price of the prime necessary of the labourer. The rise in the price of necessaries and in the wages of labour is however limited; for as soon as wages should be equal (as in the case formerly stated) to 720_l._, the whole receipts of the farmer, there must be an end of accumulation; for no capital can then yield any profit whatever, and no additional labour can be demanded, and consequently population will have reached its highest point. Long indeed before this period, the very low rate of profits will have arrested all accumulation, and almost the whole produce of the country, after paying the labourers, will be the property of the owners of land and the receivers of tithes and taxes.

Thus, taking the former very imperfect basis as the grounds of my calculation, it would appear that when corn was at 20_l._ per quarter, the whole net income of the country would belong to the landlords, for then the same quantity of labour that was originally necessary to produce 180 quarters, would be necessary to produce 36; since 20_l._: 4_l._:: 180: 36. The farmer then, who originally produced 180 quarters, (if any such there were, for the old and new capital employed on the land would be so blended, that it could in no way be distinguished,) would sell the 180 qrs. at 20_l._ per qr. or L3600 the value of 144 qrs. {to landlord for rent, being the } --- {difference between 36 and 180 qrs.} 2880 36 qrs. 720 the value of 36 qrs. to labourers ten in number 720 --- leaving nothing whatever for profit.

At this price of 20_l._ the labourers would continue to consume three quarters each per annum or L60 And on other commodities they would expend 12 -- 72 for each labourer. -- And therefore ten labourers would cost 720_l._ per annum.

In all these calculations I have been desirous only to elucidate the principle, and it is scarcely necessary to observe, that my whole basis is assumed at random, and merely for the purpose of exemplification. The results though different in degree, would have been the same in principle, however accurately I might have set out in stating the difference in the number of labourers necessary to obtain the successive quantities of corn required by an increasing population, the quantity consumed by the labourer's family, &c. &c. My object has been to simplify the subject, and I have therefore made no allowance for the increasing price of the other necessaries, besides food, of the labourer; an increase which would be the consequence of the increased value of the raw material from which they are made, and which would of course further increase wages, and lower profits.

I have already said, that long before this state of prices was become permanent, there would be no motive for accumulation; for no one accumulates but with a view to make his accumulation productive, and it is only when so employed that it operates on profits. Without a motive there could be no accumulation, and consequently such a state of prices never could take place. The farmer and manufacturer can no more live without profit, than the labourer without wages. Their motive for accumulation will diminish with every diminution of profit, and will cease altogether when their profits are so low as not to afford them an adequate compensation for their trouble, and the risk which they must necessarily encounter in employing their capital productively.

I must again observe, that the rate of profits would fall much more rapidly than I have estimated in my calculation: for the value of the produce being what I have stated it under the circumstances supposed, the value of the farmer's stock would be greatly increased from its necessarily consisting of many of the commodities which had risen in value. Before corn could rise from 4_l._ to 12_l._ his capital would probably be doubled in exchangeable value, and be worth 6000_l._ instead of 3000_l._ If then his profit were 180_l._, or 6 per cent. on his original capital, profits would not at that time be really at a higher _rate_ than 3 per cent.; for 6000_l._ at 3 per cent. gives 180_l._; and on those terms only could a new farmer with 6000_l._ money in his pocket enter into the farming business.

Many trades would derive some advantage, more or less, from the same source. The brewer, the distiller, the clothier, the linen manufacturer, would be partly compensated for the diminution of their profits, by the rise in the value of their stock of raw and finished materials; but a manufacturer of hardware, of jewellery, and of many other commodities, as well as those whose capitals uniformly consisted of money, would be subject to the whole fall in the rate of profits, without any compensation whatever.

We should also expect that, however the rate of the profits of stock might diminish in consequence of the accumulation of capital on the land, and the rise of wages, yet the aggregate amount of profits would increase. Thus supposing that, with repeated accumulations of 100,000_l._, the rate of profit should fall from 20 to 19, to 18, to 17 per cent., a constantly diminishing rate, we should expect that the whole amount of profits received by those successive owners of capital would be always progressive; that it would be greater when the capital was 200,000_l._, than when 100,000_l._; still greater when 300,000_l._; and so on, increasing, though at a diminishing rate, with every increase of capital. This progression however is only true for a certain time: thus 19 per cent. on 200,000_l._ is more than 20 on 100,000_l._; again 18 per cent. on 300,000_l._ is more than 19 per cent. on 200,000_l._; but after capital has accumulated to a large amount, and profits have fallen, the further accumulation diminishes the aggregate of profits. Thus suppose the accumulation should be 1,000,000_l._, and the profits 7 per cent. the whole amount of profits will be 70,000_l._; now if an addition of 100,000_l._ capital be made to the million, and profits should fall to 6 per cent., 66,000_l._ or a diminution of 4000_l._ will be received by the owners of stock, although the whole amount of stock will be increased from 1,000,000_l._ to 1,100,000_l._ There can, however, be no accumulation of capital, so long as stock yields any profit at all, without its yielding not only an increase of produce, but an increase of value. By employing 100,000_l._ additional capital, no part of the former capital will be rendered less productive. The produce of the land and labour of the country must increase, and its value will be raised, not only by the value of the addition which is made to the former quantity of productions, but by the new value which is given to the whole produce of the land, by the increased difficulty of producing the last portion of it, which new value always goes to rent. When the accumulation of capital, however, becomes very great, notwithstanding this increased value, it will be so distributed that a less value than before will be appropriated to profits, while that which is devoted to rent and wages will be increased. Thus with successive additions of 100,000_l._ to capital, with a fall in the rate of profits, from 20 to 19, to 18, to 17 per cent. &c. the productions annually obtained will increase in quantity, and be of more than the whole additional value, which the additional capital is calculated to produce. From 20,000_l._ it will rise to more than 39,000_l._ and then to more than 57,000_l._, and when the capital employed is a million, as we before supposed, if 100,000_l._ more be added to it, and the aggregate of profits is actually lower than before, more than 6000_l._ will nevertheless be added to the revenue of the country, but it will be to the revenue of the landlords; they will obtain more than the additional produce, and will from their situation be enabled to encroach even on the former gains of the capitalist. Thus, suppose the price of corn to be 4_l._ per quarter, and that therefore, as we before calculated, of every 720_l._ remaining to the farmer after payment of his rent, 480_l._ were retained by him, and 240_l._ were paid to his labourers; when the price rose to 6_l._ per quarter, he would be obliged to pay his labourers 300_l._ and retain only 420_l._ for profits. Now if the capital employed were so large as to yield a hundred thousand times 720_l._ or 72,000,000_l._ the aggregate of profits would be 48,000,000_l._ when wheat was at 4_l._ per quarter; and if by employing a larger capital, 105,000 times 720_l._ were obtained when wheat was at 6_l._, or 75,600,000_l._, profits would actually fall from 48,000,000_l._ to 44,100,000_l._ or 105,000 times 420_l._, and wages would rise from 24,000,000_l._ to 31,500,000_l._ Wages would rise because more labourers would be employed, in proportion to capital; and each labourer would receive more money wages; but the condition of the labourer, as we have already shewn, would be worse, inasmuch as he would be able to command a less quantity of the produce of the country. The only real gainers would be the landlords; they would receive higher rents, first, because produce would be of a higher value, and secondly, because they would have a greatly increased proportion.

Although a greater value is produced, a greater proportion of what remains of that value, after paying rent, is consumed by the producers, and it is this, and this alone, which regulates profits. Whilst the land yields abundantly, wages may temporarily rise, and the producers may consume more than their accustomed proportion; but the stimulus which will thus be given to population, will speedily reduce the labourers to their usual consumption. But when poor lands are taken into cultivation, or when more capital and labour are expended on the old land, with a less return of produce, the effect must be permanent. A greater proportion of that part of the produce which remains to be divided, after paying rent, between the owners of stock and the labourers, will be apportioned to the latter. Each man may, and probably will, have a less absolute quantity; but as more labourers are employed in proportion to the whole produce retained by the farmer, the value of a greater proportion of the whole produce will be absorbed by wages, and consequently the value of a smaller proportion will be devoted to profits. This will necessarily be rendered permanent by the laws of nature, which have limited the productive powers of the land.

Thus we again arrive at the same conclusion which we have before attempted to establish:--that in all countries, and at all times, profits depend on the quantity of labour requisite to provide necessaries for the labourers, on that land or with that capital which yields no rent. The effects then of accumulation will be different in different countries, and will depend chiefly on the fertility of the land. However extensive a country may be where the land is of a poor quality, and where the importation of food is prohibited, the most moderate accumulations of capital will be attended with great reductions in the rate of profit, and a rapid rise in rent; and on the contrary a small but fertile country, particularly if it freely permits the importation of food, may accumulate a large stock of capital without any great diminution in the rate of profits, or any great increase in the rent of land. In the Chapter on Wages, we have endeavoured to shew that the money price of commodities would not be raised by a rise of wages, either on the supposition that gold, the standard of money, was the produce of this country, or that it was imported from abroad. But if it were otherwise, if the prices of commodities were permanently raised by high wages, the proposition would not be less true, which asserts that high wages invariably affect the employers of labour, by depriving them of a portion of their real profits. Supposing the hatter, the hosier, and the shoemaker, each paid 10_l._ more wages in the manufacture of a particular quantity of their commodities, and that the price of hats, stockings, and shoes, rose by a sum sufficient to repay the manufacturer the 10_l._; their situation would be no better than if no such rise took place. If the hosier sold his stockings for 110_l._ instead of 100_l._, his profits would be precisely the same money amount as before; but as he would obtain in exchange for this equal sum, one tenth less of hats, shoes, and every other commodity, and as he could with his former amount of savings employ fewer labourers at the increased wages, and purchase fewer raw materials at the increased prices, he would be in no better situation than if his money profits had been really diminished in amount, and every thing had remained at its former price. Thus then I have endeavoured to shew, first, that a rise of wages would not raise the price of commodities, but would invariably lower profits; and secondly, that if the prices of commodities could be raised, still the effect on profits would be the same; and that in fact the value of the medium only in which prices and profits are estimated would be lowered.

CHAPTER VI.

ON FOREIGN TRADE.

No extension of foreign trade will immediately increase the amount of value in a country, although it will very powerfully contribute to increase the mass of commodities, and therefore the sum of enjoyments. As the value of all foreign goods is measured by the quantity of the produce of our land and labour, which is given in exchange for them, we should have no greater value, if by the discovery of new markets, we obtained double the quantity of foreign goods in exchange for a given quantity of ours. If by the purchase of English goods to the amount of 1000_l._ a merchant can obtain a quantity of foreign goods, which he can sell in the English market for 1,200_l._, he will obtain 20 per cent. profit by such an employment of his capital; but neither his gains, nor the value of the commodities imported, will be increased or diminished by the greater or smaller quantity of foreign goods obtained. Whether, for example, he imports twenty-five or fifty pipes of wine, his interest can be no way affected, if at one time the twenty-five pipes, and at another the fifty pipes, equally sell for 1,200_l._ In either case his profit will be limited to 200_l._, or 20 per cent. on his capital; and in either case the same value will be imported into England. If the fifty pipes sold for more than 1,200_l._, the profits of this individual merchant would exceed the general rate of profits, and capital would naturally flow into this advantageous trade, till the fall of the price of wine had brought every thing to the former level.

It has indeed been contended, that the great profits which are sometimes made by particular merchants in foreign trade, will elevate the general rate of profits in the country, and that the abstraction of capital from other employments, to partake of the new and beneficial foreign commerce, will raise prices generally, and thereby increase profits. It has been said, by high authority, that less capital being necessarily devoted to the growth of corn, to the manufacture of cloth, hats, shoes, &c. while the demand continues the same, the price of these commodities will be so increased, that the farmer, hatter, clothier, and shoemaker, will have an increase of profits, as well as the foreign merchant.[13] They who hold this argument agree with me, that the profits of different employments have a tendency to conform to one another; to advance and recede together. Our variance consists in this: They contend, that the equality of profits will be brought about by the general rise of profits; and I am of opinion, that the profits of the favoured trade will speedily subside to the general level.

For, first, I deny that less capital will necessarily be devoted to the growth of corn, to the manufacture of cloth, hats, shoes, &c., unless the demand for these commodities be diminished; and if so, their price will not rise. In the purchase of foreign commodities, either the same, a larger, or a less portion of the produce of the land and labour of England will be employed. If the same portion be so employed, then will the same demand exist for cloth, shoes, corn, and hats, as before, and the same portion of capital will be devoted to their production. If, in consequence of the price of foreign commodities being cheaper, a less portion of the annual produce of the land and labour of England is employed in the purchase of foreign commodities, more will remain for the purchase of other things. If there be a greater demand for hats, shoes, corn, &c. than before, which there may be, the consumers of foreign commodities having an additional portion of their revenue disposable, the capital is also disposable with which the greater value of foreign commodities was before purchased; so that with the increased demand for corn, shoes, &c. there exists also the means of procuring an increased supply, and therefore neither prices nor profits can permanently rise. If more of the produce of the land and labour of England be employed in the purchase of foreign commodities, less can be employed in the purchase of other things, and therefore fewer hats, shoes, &c. will be required. At the same time that capital is liberated from the production of shoes, hats, &c. more must be employed in manufacturing those commodities with which foreign commodities are purchased; and consequently in all cases the demand for foreign and home commodities together, as far as regards value, is limited by the revenue and capital of the country. If one increases, the other must diminish. If the importation of wine, given in exchange for the same quantity of English commodities be doubled, the people of England can either consume double the quantity of wine that they did before, or the same quantity of wine and a greater quantity of English commodities. If my revenue had been 1000_l._, with which I purchased annually one pipe of wine for 100_l._ and a certain quantity of English commodities for 900_l._; when wine fell to 50_l._ per pipe, I might lay out the 50_l._ saved, either in the purchase of an additional pipe of wine, or in the purchase of more English commodities. If I bought more wine, and every wine-drinker did the same, the foreign trade would not be in the least disturbed; the same quantity of English commodities would be exported in exchange for wine, and we should receive double the quantity, though not double the value of wine. But if I, and others contented ourselves with the same quantity of wine as before, fewer English commodities would be exported, and the wine-drinkers might either consume the commodities which were before exported, or any others for which they had an inclination. The capital required for their production would be supplied by the capital liberated from the foreign trade.

There are two ways in which capital may be accumulated: it may be saved either in consequence of increased revenue, or of diminished consumption. If my profits are raised from 1000_l._ to 1200_l._ while my expenditure continues the same, I accumulate annually 200_l._ more than I did before. If I save 200_l._ out of my expenditure while my profits continue the same, the same effect will be produced; 200_l._ per annum will be added to my capital. The merchant who imported wine after profits had been raised from 20 per cent. to 40 per cent., instead of purchasing his English goods for 1000_l._, must purchase them for 857_l._ 2_s._ 10_d._, still selling the wine which he imports in return for those goods for 1200_l._; or, if he continued to purchase his English goods for 1000_l._, must raise the price of his wine to 1400_l._; he would thus obtain 40 instead of 20 per cent. profit on his capital; but if, in consequence of the cheapness of all the commodities on which his revenue was expended, he and all other consumers could save the value of 200_l._ out of every 1000_l._ they before expended, they would more effectually add to the real wealth of the country; in one case, the savings would be made in consequence of an increase of revenue, in the other in consequence of diminished expenditure.

If, by the introduction of machinery, the generality of the commodities on which revenue was expended fell 20 per cent. in value, I should be enabled to save as effectually as if my revenue had been raised 20 per cent.; but in one case the rate of profits is stationary, in the other it is raised 20 per cent.--If, by the introduction of cheap foreign goods, I can save 20 per cent. from my expenditure, the effect will be precisely the same as if machinery had lowered the expense of their production, but profits would not be raised.

It is not, therefore, in consequence of the extension of the market that the rate of profits is raised, although such extension may be equally efficacious in increasing the mass of commodities, and may thereby enable us to augment the funds destined for the maintenance of labour, and the materials on which labour may be employed. It is quite as important to the happiness of mankind, that our enjoyments should be increased by the better distribution of labour, by each country producing those commodities for which by its situation, its climate, and its other natural or artificial advantages it is adapted, and by their exchanging them for the commodities of other countries, as that they should be augmented by a rise in the rate of profits.