I. But it would be almost impossible to build your city in such a situation that it would need no imposts?--Impossible.--Other persons would then be required, who might undertake to conduct from another city those things of which they stood in need?--Certainly.--But the merchant who should return to his own city, without any of those articles which it needed, would return empty-handed. It will be necessary, therefore, not only to produce a sufficient supply, but such articles, both in quantity and in kind, as may be required to remunerate those who conduct the imports. There will be needed then more husbandmen, and other artificers, in our city. There will be needed also other persons who will undertake the conveyance of the imports and the exports, and these persons are called merchants. If the commerce which these necessities produce is carried on by sea, other persons will be required who are accustomed to nautical affairs. And, in the city itself, how shall the products of each man’s labour be transported from one to another; those products, for the sake of the enjoyment and the ready distribution of which, they were first induced to institute a civil society?--By selling and buying, surely.--A market and money, as a symbol of exchange, arises out of this necessity?--Evidently.--When the husbandman, or any other artificer, brings the produce of his labours to the public place, and those who desire to barter their produce for it do not happen to arrive exactly at the same time, would he not lose his time, and the profit of it, if he were to sit in the market waiting for them?--Assuredly.--But, there are persons, who, perceiving this, will take upon themselves the arrangement between the buyer and the seller. In constituted civil societies, those who are employed on this service, ought to be the infirm, and unable to perform any other; but, exchanging on one hand for money, what any person comes to sell, and giving the articles thus bought for a similar equivalent to those who might wish to buy. II. Description of a frugal enjoyment of the goods of the world.