… is from page 78 of Liberty Fund’s 1990 edition of Bertrand de Jouvenel’s 1951 tract, The Ethics of Redistribution:
During the whole range of life of commercial society, from the end of the Middle Ages to our day, the wealth of the rich merchant has been resented far more than the pomp of rulers.
(BTW, here’s Richard Ebeling’s review of the 1990 edition.)