book 1

, chap. ix.

Labour and capitals tend naturally to diffuse themselves through every species of employment; and, as certain employments are, by their nature, accompanied with inconveniencies and difficulties which do not occur in others, while these, on the contrary, offer some real or imaginary advantages which are peculiar to themselves; wages and profits should rise and fall in proportion to these advantages and disadvantages; thus forming a complete equilibrium between the various kinds of employment. The arbitrary and oppressive policy of Europe, in many instances, opposes the establishment of this equilibrium, which is conformable to the order of nature--