So soon as all foreign trade comes to a stop, without a scheme for recalling it, and that domestic consumption has filled up its place in consuming the work, and giving bread to the industrious, we find ourselves obliged to reason again upon the principles of the first book. The statesman has once more both the producers and the consumers under his care. The consumers can live without employment, the producers cannot. The first seldom have occasion for the statesman’s protection; the last constantly stand in need of it. There is a perpetual fluctuation in the balance between these two classes, from which a multitude of new principles arise; and these render the administration of government infinitely more difficult, and require superior talents in the person who is at the helm. I shall here only point out the most striking effects of the fluctuation and overturn of this new balance, which in the subsequent chapters shall be more fully illustrated. _1mo._ In proportion as the consumers become extravagant, the producers become wealthy; and when the former become bankrupts, the latter fill their place. _2do._ As the former become frugal and oeconomical, the latter languish; when those begin to hoard, and to adopt a simple life, these are extinguished: all extremes are vicious. _3tio._ If the produce of industry consumed in a country, surpass the income of those who do not work, the balance due by the consumers must be paid to the suppliers by a proportional alienation of their funds. This vibration of the balance, gives a very correct idea of what is meant by _relative profit and loss_. The nation here loses nothing by the change produced. _4to._ When, on the other hand, the annual produce of industry consumed in a country, does not amount to the value of the income of those who do not work, the balance of income saved, must either be locked up in chests, made into plate, lent to foreigners, or fairly exported as the price of foreign consumption. _5to._ The scales stand even when there is no balance on either side; that is, when the domestic consumption is just equivalent to the annual income of the funds. I do not pretend to decide at present whether this exact equilibrium marks the state of perfection in a country where there is no foreign trade, (of which we are now treating) or whether it be better to have small vibrations between the two scales; but I think I may say, that all subversions of the balance on either side cannot fail to be hurtful, and therefore should be prevented. Let this suffice at present, upon a subject which shall be more fully treated of afterwards. Let us now fix our attention upon the interests of a people entirely taken up in the prosecution of foreign trade. So long as this spirit prevails, I say, it is the duty of a statesman to encourage frugality, sobriety, and an application to labour in his own people, and to excite in foreign nations a taste for superfluities as much as possible.