Now, I ask, Did
this process take place when Darwinism supplanted the traditional
theory of the fixity of species? Surely it is clear that it is only in
the rarest cases that false or inadequate ideas on such subjects have
any tendency to shorten life or weaken health. Bishop Wilberforce was
killed by a fall from his horse, not by the triumphant dialectic of
Professor Huxley. Sir Richard Owen lived to a patriarchal old age, and
did not disappear from the face of the earth because he still clung to
an idea which the best intellect of his time had relinquished. There
is nothing in the doctrine of the fixity of species--if you hold
it--which will in the least degree tend to diminish vitality. Natural
selection has practically no effect at all in exterminating those who
adhere to this idea. There is no means of livelihood from which it
would exclude them except indeed that it might prevent them from
occupying Chairs of Biology. Apart from that I do not think it will
hinder them in any of the various modes of activity in which the
struggle for life is manifested.
What was it then that led to the victory of the one idea over the
other? The cause was intellectual. With the experts, it was logical
conviction: one set of ideas was found to fit the facts somewhat
better than the other set of ideas. With men in general the
intellectual change came more slowly and in a different way: they
adopted or imitated the ideas of those who knew.
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