An Inquiry Into the Nature and Causes of the Wealth of Nations

by Adam Smith; M. Garnier

The 15th of Charles II. c. 7, however, with all its imperfections, has, perhaps, contributed more, both to the plentiful supply of the home market, and to the increase of tillage, than any other law in the statute book. It is from this law that the inland corn trade has derived all the liberty and protection which it has ever yet enjoyed; and both the supply of the home market and the interest of tillage are much more effectually promoted by the inland, than either by the importation or exportation trade.

The proportion of the average quantity of all sorts of grain imported into Great Britain to that of all sorts of grain consumed, it has been computed by the author of the Tracts upon the Corn Trade, does not exceed that of one to five hundred and seventy. For supplying the home market, therefore, the importance of the inland trade must be to that of the importation trade as five hundred and seventy to one.

The average quantity of all sorts of grain exported from Great Britain does not, according to the same author, exceed the one-and-thirtieth part of the annual produce. For the encouragement of tillage, therefore, by providing a market for the home produce, the importance of the inland trade must be to that of the exportation trade as thirty to one.

I have no great faith in political arithmetic, and I mean not to warrant the exactness of either of these computations. I mention them only in order to show of how much less consequence, in the opinion of the most judicious and experienced persons, the foreign trade of corn is than the home trade. The great cheapness of corn in the years immediately preceding the establishment of the bounty may, perhaps with reason, be ascribed in some measure to the operation of this statute of Charles II. which had been enacted about five-and-twenty years before, and which had, therefore, full time to produce its effect.

A very few words will sufficiently explain all that I have to say concerning the other three branches of the corn trade.

II. The trade of the merchant-importer of foreign corn for home consumption, evidently contributes to the immediate supply of the home market, and must so far be immediately beneficial to the great body of the people. It tends, indeed, to lower somewhat the average money price of corn, but not to diminish its real value, or the quantity of labour which it is capable of maintaining. If importation was at all times free, our farmers and country gentlemen would probably, one year with another, get less money for their corn than they do at present, when importation is at most times in effect prohibited; but the money which they got would be of more value, would buy more goods of all other kinds, and would employ more labour. Their real wealth, their real revenue, therefore, would be the same as at present, though it might be expressed by a smaller quantity of silver, and they would neither be disabled nor discouraged from cultivating corn as much as they do at present. On the contrary, as the rise in the real value of silver, in consequence of lowering the money price of corn, lowers somewhat the money price of all other commodities, it gives the industry of the country where it takes place some advantage in all foreign markets, and thereby tends to encourage and increase that industry. But the extent of the home market for corn must be in proportion to the general industry of the country where it grows, or to the number of those who produce something else, and, therefore, have something else, or, what comes to the same thing, the price of something else, to give in exchange for corn. But in every country, the home market, as it is the nearest and most convenient, so is it likewise the greatest and most important market for corn. That rise in the real value of silver, therefore, which is the effect of lowering the average money price of corn, tends to enlarge the greatest and most important market for corn, and thereby to encourage, instead of discouraging its growth.

By the 22nd of Charles II. c. 13, the importation of wheat, whenever the price in the home market did not exceed 53s. 4d. the quarter, was subjected to a duty of 16s. the quarter; and to a duty of 8s. whenever the price did not exceed L.4. The former of these two prices has, for more than a century past, taken place only in times of very great scarcity; and the latter has, so far as I know, not taken place at all. Yet, till wheat had risen above this latter price, it was, by this statute, subjected to a very high duty; and, till it had risen above the former, to a duty which amounted to a prohibition. The importation of other sorts of grain was restrained at rates and by duties, in proportion to the value of the grain, almost equally high.[40] Subsequent laws still further increased those duties.

The distress which, in years of scarcity, the strict execution of those laws might have brought upon the people, would probably have been very great; but, upon such occasions, its execution was generally suspended by temporary statutes, which permitted, for a limited time, the importation of foreign corn. The necessity of these temporary statutes sufficiently demonstrates the impropriety of this general one.

These restraints upon importation, though prior to the establishment of the bounty, were dictated by the same spirit, by the same principles, which afterwards enacted that regulation. How hurtful soever in themselves, these, or some other restraints upon importation, became necessary in consequence of that regulation. If, when wheat was either below 48s. the quarter, or not much above it, foreign corn could have been imported, either duty free, or upon paying only a small duty, it might have been exported again, with the benefit of the bounty, to the great loss of the public revenue, and to the entire perversion of the institution, of which the object was to extend the market for the home growth, not that for the growth of foreign countries.

III. The trade of the merchant-exporter of corn for foreign consumption, certainly does not contribute directly to the plentiful supply of the home market. It does so, however, indirectly. From whatever source this supply may be usually drawn, whether from home growth, or from foreign importation, unless more corn is either usually grown, or usually imported into the country, than what is usually consumed in it, the supply of the home market can never be very plentiful. But unless the surplus can, in all ordinary cases, be exported, the growers will be careful never to grow more, and the importers never to import more, than what the bare consumption of the home market requires. That market will very seldom be overstocked; but it will generally be understocked; the people, whose business it is to supply it, being generally afraid lest their goods should be left upon their hands. The prohibition of exportation limits the improvement and cultivation of the country to what the supply of its own inhabitants require. The freedom of exportation enables it to extend cultivation for the supply of foreign nations.