If the resources which nature has accumulated around man and placed at his disposal are varied, the human faculties themselves are not less so. We are not all equally endowed with strength, courage, intelligence, patience, or with artistic, literary, and industrial aptitudes. Without exchange, this diversity, far from contributing to our well-being, would contribute to our misery, each feeling less the advantage of those Faculties he possessed than the deprivation of those he wanted. Thanks to exchange, a man possessed of bodily strength may, up to a certain point, dispense with genius, and a man of intelligence with bodily strength; for by the admirable community which the power of exchange establishes among men, each individual participates in the distinctive qualities of his neighbours. In order to obtain the satisfactions he desires, it is not enough, in most cases, to work—to exercise his faculties upon, or by means of, natural agents. He requires also to have tools, instruments, machines, provisions—in a word, Capital. Suppose a small tribe, composed of ten families, each, in working exclusively for itself, being obliged to engage in ten different employments. In that case each family must have ten sets of industrial apparatus. The tribe would require to possess ten ploughs, ten teams of oxen, ten forges, ten joiner’s and carpenter’s workshops, ten looms, etc.; while, with the power of exchange, a single plough, a single team, a single forge, a single loom, would be sufficient. It is impossible to conceive the economy of Capital which we owe to exchange. The reader now sees clearly what constitutes the true power of exchange. It is not, as Condillac says, that it implies ‹two gains›, because of each of the contracting parties valuing more highly what he receives than what he gives. Neither is it that each gives away what is superfluous for what is necessary. It lies simply in this, that when one man says to another, “Do you only this, and I shall do only that, and we shall divide,” there is a better and more advantageous employment of labour, of faculties, of natural agents, of capital, and consequently there is ‹more› to divide. And these results take place to a still greater extent when [p108] three, ten, a hundred, a thousand, or several millions of men enter into the association. The two propositions which I have laid down, then, are rigorously true, viz.:— ‹In isolation our wants exceed our powers;› ‹In society our powers exceed our wants.› The first is true, seeing that the whole surface of our country would not maintain one man in a state of absolute isolation. The second is true, seeing that, in fact, the population which is spread over that same surface multiplies and grows richer.