"Though in Hume, and also in the works of Bernard Mandeville, we can watch the gradual emergence of the twin concepts of the formations of spontaneous orders and of selective evolution [...], it was Adam Smith and Adam Ferguson who first made systematic use of this approach. Smith's work marks the breakthrough of an evolutionary approach which has progressively displaced the stationary Aristotelian view. The nineteenth-century enthusiast who claimed that the Wealth of Nations was in importance second only to the Bible has often been ridiculed; but he may not have exaggerated so much. Even Aristotle's disciple Thomas Aquinas could not conceal from himself that multae utilitates impedirentur si omnia peccata districte prohiberentur - that much that is useful would be prevented if all sins were strictly prohibited (Summa Theologica, II, ii, q. 78 i)."