CHAPTER XVIII.

less quantity that would have been produced, had no improvement taken place, an effect is also produced on the portion of goods still unconsumed, which were manufactured previously to the improvement; the value of those goods will be reduced, inasmuch as they must fall to the level, quantity for quantity, of the goods produced under all the advantages of the improvement: and the society will, notwithstanding the increased quantity of its commodities, notwithstanding its augmented riches, and its augmented means of enjoyment, have a less amount of value. By constantly increasing the facility of production, we constantly diminish the value of some of the commodities before produced, though by the same means we not only add to the national riches, but also to the power of future production. Many of the errors in political economy have arisen from errors on this subject, from considering an increase of riches, and an increase of value, as meaning the same thing, and from unfounded notions as to what constituted a standard measure of value. One man considers money as a standard of value, and a nation grows richer or poorer, according to him, in proportion as its commodities of all kinds can exchange for more or less money. Others represent money as a very convenient medium for the purpose of barter, but not as a proper measure by which to estimate the value of other things: the real measure of value according to them is corn,¹ and a country is rich or poor, according as its commodities will exchange for more or less corn. There are others again, who consider a country rich or poor, according to the quantity of labour that it can purchase.² But why should gold, or corn, or labour, be the standard measure of value, more than coals or iron?—more than cloth, soap, candles, and the other necessaries of the labourer?—why, in short, should any commodity, or all commodities together, be the standard, when such a standard is itself subject to fluctuations in value? Corn, as well as gold, may from difficulty or facility of production, vary 10, 20, or 30 per cent., relatively to other things; why should we always say, that it is those other things which have varied, and not the corn? That commodity is alone