As a natural result of this diversity any two of these villagers may profitably exchange their respective efforts with each other, provided of course each has a desire for the product of the other, to the manifest lessening of the effort of each relatively to the satisfaction of each, and the more so as the relative superiority of each to the other in his own trade is the greater. This point will repay some pains in minute illustration. If the blacksmith can make and set horse-shoes only a trifle better than the tailor could do this if he tried, and the tailor can make coats only a little better than the blacksmith could make one if he chose, there will be but a slight benefit to each in their changing works with one another. For the sake of definiteness, let us say, that the tailor's capacity for making coats is 6, and his capacity in making and setting horse-shoes is 5; and also that the blacksmith's capacity for shoeing horses is 6, and his ability in making coats is 5. Each has a relative superiority to the other of 1 in his own trade; and if they exchange efforts, as they probably would under these circumstances, there is only an advantage of 2 to be divided between them. Now let us suppose (what might easily become a fact), that the tailor by exclusive and augmented attention to the conditions of his own craft carries up his capacity for making coats to 15, the blacksmith's efficiency in both the trades remaining the same as before. There will now be an increased motive to both the artisans for exchanging products with one another, and a larger gain to each than before as the result of such exchange. The diversity of relative advantage as between the two has now gone up from 2 to 11. The tailor can now make a coat much better and quicker than before; and though the blacksmith owing to his inertness can neither make nor set horse-shoes any better than before, still less make coats any better, he will after all by still trading with the tailor reap a part of the benefit of the latter's increased efficiency in making coats; the new coat is at once better and costs less than the previous one; the tailor is still less inclined than before to leave his new and greater advantage over the blacksmith to set himself to shoeing his own horse; even on the old terms the blacksmith can do that 1 better than he himself can, and rather than forego the trade he will naturally offer the blacksmith somewhat better terms than before, or in other words will feel impelled to share with the blacksmith a part of the proceeds and rewards of his own now superior skill and diligence. The trade began on the sole basis of a relative diversity of advantage as between the two mechanics, each in his own craft; this relative diversity, without which no exchange ever takes place between any two persons, has now gone up as between these two from 2 units of advantage to 11 units of advantage; how will these 11 units be divided in this case? Nobody can