… is from Book IV, Chapter 3  – on page 493, Vol. 1, of the 1981 Liberty Fund edition  – of Adam Smith’s 1776 An Inquiry Into the Nature and Causes of the Wealth of Nations :
By such [mercantilist] maxims as these, however, nations have been taught that their interest consisted in beggaring all their neighbors. Each nation has been made to look with an invidious eye upon the prosperity of all the nations with which it trades, and to consider their gain as its own loss. Commerce, which ought naturally to be, among nations, as among individuals, a bond of union and friendship, has become the most fertile source of discord and animosity. The capricious ambition of kings and ministers has not, during the present and the preceding century, been more fatal to the repose of Europe than the impertinent jealousy of merchants and manufacturers. The violence and injustice of the rulers of mankind is an ancient evil, for which, I am afraid, the nature of human affairs can scarce admit of a remedy. But the mean rapacity, the monopolizing spirit of merchants and manufacturers, who neither are, nor ought to be, the rulers of mankind, though it cannot perhaps be corrected may very easily be prevented from disturbing the tranquillity of anybody but themselves.
DBx: Among the most comical (were it not so dangerous) delusions of people on the political left is the delusion that tariffs and other trade restrictions restrain – rather than reflect and fuel – the power and political influence of private businesses, and especially of large corporations.