| In studying both the recurrence of special habits or ideas in several districts, and their prevalence within each district, there come before us ever-repeated proofs of regular causation producing the phenomena of human life, and of laws of maintenance and diffusion conditions of society, at definite stages of culture. But, while giving full importance to the evidence bearing on these standard conditions of society, let us be careful to avoid a pitfall which may entrap the unwary student. Of course the opinions and habits belonging in common to masses of mankind are to a great extent the results of sound judgment and practical wisdom. But to a great extent it is not so. That many numerous societies of men should have believed in the influence of the evil eye and the existence of a firmament, should have sacrificed slaves and goods to the ghosts of the departed, should have handed down traditions of giants slaying monsters and men turning into beast--all this is ground for holding that such ideas were indeed produced in men's minds by efficient causes, but it is not ground for holding that the rites in question are profitable, the beliefs sound, and the history authentic. This may seem at the first glance a truism, but, in fact, it is the denial of a fallacy which deeply affects the minds of all but a small critical minority of mankind. Popularly, what everybody says must be true, what everybody does must be right--"Quod ubique, quod semper, quod ab omnibus creditum est, hoc est vere proprieque Catholicum' --and m forth. There are various topics, especially in history, law, philosophy, and theology, where even the educated people we live among can hardly be brought to see that the cause why men do hold an opinion, or practise a custom, is by no means necessarily a reason why they ought to do so. Now collections of ethnographic evidence bringing so prominently into view the agreement of immense multitudes of men as to certain traditions, beliefs, and usages, are peculiarly liable to be thus improperly used in direct defense of these institutions themselves, even old barbaric nations being polled to maintain their opinions against what are called modern ideas. As it has more than once happened to myself to find my collections of traditions and beliefs thus set up to prove their own objective truth, without proper examination of the grounds on which they were actually received, I take this occasion of remarking that the same line of argument will serve equally well to demonstrate, by the strong and wide consent of nations, that the earth is flat, and nightmare the visit of a demon. |