Only admit that exchange is at once the cause and the effect of the division of labour and the separation of employments; only admit that the separation of occupations multiplies ‹satisfactions› in proportion to ‹efforts›, for the reasons explained at the beginning of this chapter, and you will comprehend at once the services which Money has rendered to mankind, by the simple fact that it facilitates Exchanges. By means of Money, Exchange is indefinitely extended and developed. Each man casts his services into the common fund, without knowing who is to enjoy the satisfactions which they are calculated to procure. In the same way he obtains from society, not immediate services, but money with which he can afterwards purchase services, where, when, and how it may best suit him. In this way the ultimate transactions occur at various times and places, between people totally unacquainted with each other, and in the greater number of cases no one knows by whose ‹efforts› his ‹wants› will be ‹satisfied›, or to the ‹satisfaction› of whose ‹desires› his own ‹efforts› will contribute. Exchange, by the intervention of Money, resolves itself into innumerable acts of ‹barter›, of which the contracting parties themselves are ignorant. Exchange, however, confers so great a benefit on society (is it not society itself?) that it facilitates and extends it by other means besides the introduction of money. In logical order, after Want and Satisfaction united in the same individual with isolated Effort—after simple barter—after barter ‹à deux facteurs›, or Exchange composed of ‹sale› and ‹purchase›—come other transactions, extended farther over time and space by means of credit, mortgages, bills of exchange, bank notes, etc. By means of this wondrous machinery, the result of civilisation, the improver of civilisation, and itself becoming more perfect at the same time, an exertion made at the present hour in Paris may contribute to the satisfaction and enjoyment of an unknown stranger, separated from us by oceans and centuries; and he who makes the exertion will not the less receive for it a present recompense, through the intervention of persons who advance the remuneration, and wait to be reimbursed in a distant country or at a future day. Marvellous and astonishing complication! which, when subjected to analysis, shows us finally the accomplishment of the entire economic cycle—‹want›, ‹effort›, ‹satisfaction›, taking place in each individual, according to a just law.