The less attentive any government is to do their duty, the more essential it is that every individual be animated by _that_ spirit, which then languishes in the very part where it ought to flourish with the greatest strength and vigour; and on the other hand, the more public spirit is shewn in the administration of public affairs, the less occasion has the state for assistance from individuals. Now as I suppose my statesman to do his duty in the most minute particulars, so I allow every one of his subjects to follow the dictates of his private interest. All I require is an exact obedience to the laws. This also is the interest of every one; for he who transgresses ought most undoubtedly to be punished: and this is all the public spirit which any perfect government has occasion for. ------------------------------------------------------------------------ CHAP. I. _Of the reciprocal Connections between Trade and Industry._ I am now going to treat of trade and industry, two different subjects, but which are as thoroughly blended together, as those we have discussed in the first book. Similar to these in their mutual operations, they are reciprocally aiding and assisting to each other, and it is by the constant vibration of the balance between them, that both are carried to their height of perfection and refinement. _TRADE_ _is an operation, by which the wealth, or work, either of individuals, or of societies, may be exchanged, by a set of men called merchants, for an equivalent, proper for supplying every want, without any interruption to industry, or any check upon consumption_. _INDUSTRY_ _is the application to ingenious labour in a free man, in order to procure, by the means of trade, an equivalent, fit for the supplying every want_. I must observe, that these definitions are only just, relatively to my subject, and to one another: for _trade_ may exist without _industry_, because things produced partly by nature may be exchanged between men; _industry_ may be exercised without _trade_, because a man may be very ingenious in working to supply his own consumption, and where there is no exchange, there can be no _trade_. _Industry_ likewise is different from _labour_. _Industry_, as I understand the term, must be voluntary; _labour_ may be forced: the one and the other may produce the same effect, but the political consequences are vastly different. _Industry_, therefore, is only applicable to free men; _labour_ may be performed by slaves. Let me examine this last distinction a little more closely, the better to try whether it be just, and to point out the consequences which result from it.