… is from page 90 of the late Ronald Max Hartwell’s 1975 paper “Capitalism and the Historians,” as this paper appears in Essays on Hayek (Fritz Machlup, ed., 1976):
Historical myths about capitalism are basic to the widespread dislike of capitalism, and do much to discredit the economic system of private property and market economy. Destroy these myths, and the easy ideological attack on capitalism is weakened and made more difficult to sustain.