The Wealth of Nations by Part 1 Chapter 10 Page 88

They have commonly neither inclination nor fitness to enter into combinations; and the clamour and sophistry of merchants and manufacturers easily persuade them that the private interest of a part, and of a subordinate part of the society, is the general interest of the whole.

In Great Britain the superiority of the industry of the towns over that of the country seems to have been greater formerly than in the present times. The wages of country labour approach nearer to those of manufacturing labour, and the profits of stock employed in agriculture to those of trading and manufacturing stock, than they are said to have done in the last century, or in the beginning of the present. This change may be regarded as the necessary, though very late consequence of the extraordinary encouragement given to the industry of the towns.