Page:Principles of Political Economy Vol 2.djvu/294

274 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