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In every other art and manufacture, the effects of the division

of labour are similar to what they are in this very trifling one,

though, in many of them, the labour can neither be so much

subdivided, nor reduced to so great a simplicity of operation.

The division of labour, however, so far as it can be introduced,

occasions, in every art, a proportionable increase of the

productive powers of labour. The separation of different trades

and employments from one another, seems to have taken place in

consequence of this advantage. This separation, too, is generally

carried furthest in those countries which enjoy the highest

degree of industry and improvement; what is the work of one man,

in a rude state of society, being generally that of several in an

improved one. In every improved society, the farmer is generally

nothing but a farmer; the manufacturer, nothing but a

manufacturer.