(a) Association. If we may continue for purpose of illustration our childhood trust in the story of De Foe, Robinson Crusoe came to lead a very tolerable life upon his desolate island by means of his own industry directed so as to satisfy his own wants by his own efforts. He did everything for himself, and had no opportunity to buy anything or sell anything. The whole course of such an isolated life could never develop the idea of Value, would require no such word as Commodities or suggest their production, and such a man while solitary upon his island could not possess Property in the true sense of that word. Association is the first main condition of Production, because of the natural obstacles interposed between the isolated man and the supply of his various wants. If any one man try to surmount a considerable number of these natural obstacles, he must miserably fail, because his powers are not adequate to the task; and hence it follows, that, in a state of isolation, _men's wants exceed their powers_; but now let the same man devote himself to overcome a single class of obstacles, for instance, those in the way of procuring suitable clothing, and his powers are adequate to this, he soon acquires skill in it, he learns to avail himself of the free help of Nature and the facilitating processes of art, he is able to realize large products along his line, and is now ready to offer his surplus in exchange with other men, who meanwhile have been giving themselves each to another class of obstacles, have concentrated efforts and skill upon them, have succeeded by the help of Nature and art in surmounting them, and are now ready to offer their surplus commodities in exchange for others; and, the exchanges beginning to be made in all directions, men find that they thus obtain vastly greater satisfactions for their various desires than they could possibly get by direct efforts: so that we may even say, that, in a state of society through association, _men's powers tend to overtake their wants_.
Without association with his fellow-men, there is no creature so helpless, so unable to reach his true end, as is man; and therefore it is, that the impulse to association is one of the strongest of our natural impulses. Men come together, as it were by instinct, into society; and, thus associating themselves together, it is soon discovered, not only that there are various desires in the different members of the community, which are now readily met by coöperation and mutual exchange, but also that there are very different powers in the different individuals in relation to those obstacles which are to be surmounted. The tastes and aptitudes of different men are very diverse. There is a great diversity in natural gifts. One man has physical strength, another mechanical ingenuity, a third a philosophical turn, and a fourth a bent and genius for traffic. Now, then, Nature speaks in as loud a voice as she can utter, in favor of such a degree of association and exchange as shall allow a free development of these varying capacities, while they work upon the obstacles to the gratification of men's wants, which lie appropriately opposite to them.