of incest. The main reason why it has so far remained
more or less of a mystery, is that each writer advanced a single
cause, which he pressed into service to explain all the facts, the
result being confusion and contradiction. In my opinion different
agencies must be assumed in different cases. When we find among
Australians, American Indians (and even the Chinese), customs,
enforced by the strongest feelings, forbidding a man to marry a woman
belonging to the same clan or having the same surname, though not at
all related, while allowing a marriage with a sister or other near
blood relative, we are obviously not dealing with a question of incest
at all, but with some of the foolish taboos prevalent among these
races, the origin of which they themselves have forgotten. Mr. Andrew
Lang probably hit the nail on the head when he said (258) in regard to
the rule which compels savages to marry only outside of the tribe,
that these prohibitions "must have arisen in a stage of culture when
ideas of kindred were confused, included kinship with animals and
plants, and were to us almost, if not quite, unintelligible." To speak
of instinct and natural selection teaching the Veddahs to abhor
marriage with an elder sister while making union with a younger sister
_the_ proper marriage (Westermarck, 292) is surely to assume that
instinct and natural selection act in an asinine way, which they never
do--except in asses.
In a second class of cases, where lower races have ideas similar to
ours, I believe that the origin of domestic chastity must be sought in
utilitarian practices. In the earlier stages of marriage, girls are
usually bought of their parents, who profit by the sale or barter. Now
when a man marries a girl to be his wife and maid of all work, he does
not want to take her to his home hampered by a bevy of young children.
Fathers guilty of incestuous practices would therefore be unable to
dispose of their daughters to advantage, and thus a prejudice in favor
of domestic purity would gradually arise which a shrewd medicine man
would some day raise to the rank of a religious or social taboo.
As regards modern society, Darwin, Brinton, Hellwald, Bentham, and
others have advocated or endorsed the view that the reason why such a
horror of incestuous unions prevails, is that novelty is the chief
stimulus to the sexual feelings, and that the familiarity of the same
household breeds indifference. I do not understand how any think
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