The classes themselves may be, mentally speaking, perfectly definite, though it may not always be easy to say to which of them a particular object belongs. When it is uncertain in which of two classes an object should be placed, if the classification be properly made, and properly expressed, the uncertainty can turn only upon a matter of fact. It is uncertain to which class the object belongs, because it is doubtful whether it possesses in a greater degree the characteristics of the one class or those of the other. But the characteristics themselves may be defined and distinguished with the nicest exactness, and always ought to be so. Especially ought they in a case like the present, because here it is only the distinction between the ideas which is of any importance. That we should be able with ease to portion out all employments between the two classes, does not happen to be of any particular consequence.

It is frequently said that classification is a mere affair of convenience. This assertion is true in one sense, but not if its meaning be, that the most proper classification is that in which it is easiest to say whether an object belongs to one class or to the other. The use of classification is, to fix attention upon the distinctions which exist among things; and that is the best classification, which is founded upon the most important distinctions, whatever be the facilities which it may afford of ticketing and arranging the different objects which exist in nature. In fixing, therefore, the meaning of the words productive and unproductive, we ought to endeavour to render them significative of the most important distinctions which, without too glaring a violation of received usage, they can be made to express.

We ought further, when we are restricted to the employment of old words, to endeavour as far as possible that it shall not be necessary to struggle against the old associations with those words. We should, if possible, give the words such a meaning, that the propositions in which people are accustomed to use them, shall as far as possible still be true; and that the feelings habitually excited by them, shall be such as the things to which we mean to appropriate them ought to excite.

We shall endeavour to unite these conditions in the result of the following enquiry.

In whatever manner political economists may have settled the definition of productive and unproductive labour or consumption, the consequences which they have drawn from the definition are nearly the same. In proportion to the amount of the productive labour and consumption of a country, the country, they all allow, is enriched: in proportion to the amount of the unproductive labour and consumption, the country is impoverished. Productive expenditure they are accustomed to view as a gain; unproductive expenditure, however useful, as a sacrifice. Unproductive expenditure of what was destined to be expended productively, they always characterise as a squandering of resources, and call it profusion and prodigality. The productive expenditure of that which might, without encroaching upon capital, be expended unproductively, is called saving, economy, frugality. Want, misery, and starvation, are described as the lot of a nation which annually employs less and less of its labour and resources in production; growing comfort and opulence as the result of an annual increase in the quantity of wealth so employed.

Let us then examine what qualities in expenditure, and in the employment of labour, are those from which all the consequences above mentioned really flow.

The end to which all labour and all expenditure are directed, is twofold. Sometimes it is enjoyment immediately; the fulfilment of those desires, the gratification of which is wished for on its own account. Whenever labour or expense is not incurred immediately for the sake of enjoyment, and is yet not absolutely wasted, it must be incurred for the purpose of enjoyment indirectly or mediately; by either repairing and perpetuating, or adding, to the permanent sources of enjoyment.

Sources of enjoyment may be accumulated and stored up; enjoyment itself cannot. The wealth of a country consists of the sum total of the permanent sources of enjoyment, whether material or immaterial, contained in it: and labour or expenditure which tends to augment or to keep up these permanent sources, should, we conceive, be termed productive.

Labour which is employed for the purpose of directly affording enjoyment, such as the labour of a performer on a musical instrument, we term unproductive labour. Whatever is consumed by such a performer, we consider as unproductively consumed: the accumulated total of the sources of enjoyment which the nation possesses, is diminished by the amount of what he has consumed: whereas, if it had been given to him in exchange for his services in producing food or clothing, the total of the permanent sources of enjoyment in the country might have been not diminished but increased.

The performer on the musical instrument then is, so far as respects that act, not a productive, but an unproductive labourer. But what shall we say of the workman who made the musical instrument? He, most persons would say, is a productive labourer; and with reason; because the musical instrument is a permanent source of enjoyment, which does not begin and end with the enjoying, and therefore admits of being accumulated.