Montaigne said long ago: "Were I not to follow the straight road for its straightness, I should follow it for having found by experience that in the end it is commonly the happiest and most useful track." The doctrine of interest rightly understood is not then new, but among the Americans of our time it finds universal acceptance; it has become popular there; you may trace it at the bottom of all their actions, you will remark it in all they say.
Alexis de Tocqueville, Democracy in America
morals