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. Men must come together either locally or commercially, must learn each other's wants, must compare with each other powers and tastes and opportunities, must come to have some confidence in each other, and then they will begin by rendering mutual services back and forth to experience the better satisfactions and the new strength that exchanges bring. Whatever improves the character of men, and thus leads to greater confidence among them, will enlarge their commerce, and knit closer and wider ties of association and production. Neighborhood associations and productions soon create a surplus to be exchanged for something else with other neighborhoods; parts of single nations however remote from each other find a relative diversity of advantage and an increasing profit in connecting themselves by the ties of trade; and the separate nations learn, though late, that they are only one great family for the grand ends of production and progress. Even within the single nation, there is a strong tendency for particular trades to localize themselves in one spot, as for instance, the manufacture of skin gloves has centered itself for the United States in Gloversville, N. Y.; and so in the great cities that are centres of distribution, for example, the wholesale grocers of St. Paul are on one street, the dry goods houses of Boston are in close proximity, and the booksellers of New York are tending towards each other in place.