A country may be fully peopled (in the sense we understand this term) in several different ways. It may be fully stocked at one time with six millions, and at another may maintain perhaps eight or even nine millions with ease, without the soil’s being better cultivated or improved. On the other hand, a country may maintain twenty millions with ease, and by being improved as to the soil, become overstocked with fifteen millions. These two assertions must be explained.
The more frugal a people are, and the more they feed upon the plentiful productions of the earth, the more they may increase in numbers.
Were the people of England to come more into the use of living upon bread, and give over consuming so much animal food, inhabitants would certainly increase, and many rich grass fields would be thrown into tillage. Were the French to give over eating so much bread, the Dutch so much fish, the Flemish so much garden stuff, and the Germans so much sourkraut, and all take to the English diet of pork, beef, and mutton, their respective numbers would soon decay, let them improve their grounds to the utmost. These are but reflections, by the by, which the reader may enlarge upon at pleasure. The point in hand is, to know what are the consequences of a country’s being so peopled, no matter from what cause, that the soil, in its actual state of fertility, refuses to supply a sufficient quantity of such food as the inhabitants incline to live upon. These are different according to the diversity of spirit in the people.
If they be of an indolent disposition, directed in their political oeconomy by established habits and old prejudices, which prevent innovations, although a change of circumstances may demand them, the effect will be to put a stop to population; which cannot augment without an increase of food on one hand, and of industry on the other, to make the first circulate. These must go hand in hand: the precedence between them is a matter of mere curiosity and speculation.
If, on the contrary, a spirit of industry has brought the country to a certain degree of population, this spirit will not be stopt by the want of food; it will be brought from foreign countries, and this new demand, by diminishing among them the quantity usually produced for their own subsistence, will prompt the industrious to improve their lands, in order to supply the new demand without any hurt to themselves. Thus trade has an evident tendency towards the improvement of the world in general, by rendering the inhabitants of one country industrious, in order to supply the wants of another, without any prejudice to themselves. Let us make a step further.
The country fully stocked can offer in exchange for this food, nothing but the superfluity of the industry of the free hands, for that of the farmers is supposed to be consumed by the society; except indeed some species of nourishment or productions, which, being esteemed at a higher value in other countries than in those which produce them, bring a more considerable return than the value of what is exported, as when raw silk and delicate wines, &c. are given in exchange for grain and other provisions.
The superfluity of industry must, therefore, form the principal part of exportation, and if the nation fully stocked be surrounded by others which abound in grain and articles of subsistence, where the inhabitants have a taste for elegance, and are eager of acquiring the manufactures and improvements of their industrious neighbours; it is certain, that a trade with such nations will very considerably increase the inhabitants of the other, though fully stocked, relatively to the production of their own soil; and the additional numbers will only increase that of manufacturers, not of husbandmen. This is the case with Holland, and with many large trading cities which are free and have but a small territory.
If, on the contrary, the nation fully stocked be in the neighbourhood of others who take the same spirit as itself, this supply of food will become in time more difficult to be had, in proportion as their neighbours come to supply their own wants. They must therefore seek for it at a greater distance, and as soon as the expence of procuring it comes to exceed the value of the labour of the free hands employed in producing the equivalent, their work will cease to be exported, and the number of inhabitants will be diminished to the proportion of the remaining food.
I do not say that trade will cease on this account; by no means. Trade may still go on, and even be more considerable than before; but it will be a trade which never can increase inhabitants, because for this purpose there must be subsistence. It may have however numberless and great advantages: it may greatly advance the wealth of the state, and this will purchase even power and strength. A trading nation may live in profound peace at home, and send war and confusion among her enemies, without even employing her own subjects. Thus trade without increasing the inhabitants of a country can greatly add to its force, by arming those hands which she has not fed, and employing them for her service.