“It should be observed that the mind rarely leaves uncriticized the assumptions which are forced on it by herd suggestion, the tendency being for it to find more or less elaborately rationalized justifications of them. This is in accordance with the enormously exaggerated weight which is always ascribed to reason in the formation of opinion and conduct, as is very well seen, for example, in the explanation of the existence of altruism as being due to man seeing that it "pays".”