An Inquiry into the Nature and Causes of the Wealth of Nations

by Adam Smith

This change may be regarded as the necessary, though very late consequence of the extraordinary encouragement given to the industry of the towns. The stocks accumulated in them come in time to be so great, that it can no longer be employed with the ancient profit in that species of industry which is peculiar to them. That industry has its limits like every other; and the increase of stock, by increasing the competition, necessarily reduces the profit. The lowering of profit in the town forces out stock to the country, where, by creating a new demand for country labour, it necessarily raises its wages. It then spreads itself, if I my say so, over the face of the land, and, by being employed in agriculture, is in part restored to the country, at the expense of which, in a great measure, it had originally been accumulated in the town.