Page:Principles of Political Economy Vol 1.djvu/254

232 more susceptible than agriculture, of mechanical improvements, and contrivances for saving labour; and it has already been seen how greatly the division of labour, and its skilful and economical distribution, depend on the extent of the market, and on the possibility of production in large masses. In manufactures, accordingly, the causes tending to increase the productiveness of industry, preponderate greatly over the one cause which tends to diminish it: and the increase of production, called forth by the progress of society, takes place, not at an increasing, but at a continually diminishing proportional cost. This fact has manifested itself in the progressive fall of the prices and values of almost every kind of manufactured goods during two centuries past; a fall accelerated by the mechanical inventions of the last seventy or eighty years, and susceptible of being prolonged and extended beyond any limit which it would be safe to specify.

Now it is quite conceivable that the efficiency of agricultural labour might be undergoing, with the increase of produce, a gradual diminution; that the price of food, in consequence, might be progressively rising, and an ever growing proportion of the population might be needed to raise food for the whole; while yet the productive power of labour in all other branches of industry might be so rapidly augmenting, that the required amount of labour could be spared from manufactures, and nevertheless a greater produce be obtained, and the aggregate wants of the community be on the whole better supplied, than before. The benefit might even extend to the poorest class. The increased cheapness of clothing and lodging might make up to them for the augmented cost of their food.

There is, thus, no possible improvement in the arts of production which does not in one or another mode exercise an antagonist influence to the law of diminishing return to agricultural labour. Nor is it only industrial improvements which have this effect. Improvements in government, and almost every kind of moral and social advancement, operate in