productions? To secure such an exchange was, as you will remember, one of our principal objects when we formed them into a society and constituted a State.

Clearly they will buy and sell.

Then they will need a market-place, and a money-token for purposes of exchange.

Certainly.

Suppose now that a husbandman, or an artisan, brings some production to market, and he comes at a time when there is no one to exchange with him, — is he to leave his calling and sit idle in the market-place?

Not at all; he will find people there who, seeing the want, undertake the office of salesmen. In well-ordered states they are commonly those who are the weakest in bodily strength, and therefore of