_The Problem before Darwin_.
It is clear, then, that what was understood by the "origin" or the
"transmutation" of species before Darwin's work appeared, was the
comparatively simple question whether the allied species of each genus
had or had not been derived from one another and, remotely, from some
common ancestor, by the ordinary method of reproduction and by means of
laws and conditions still in action and capable of being thoroughly
investigated. If any naturalist had been asked at that day whether,
supposing it to be clearly shown that all the different species of each
genus had been derived from some one ancestral species, and that a full
and complete explanation were to be given of how each minute difference
in form, colour, or structure might have originated, and how the
several peculiarities of habit and of geographical distribution might
have been brought about--whether, if this were done, the "origin of
species" would be discovered, the great mystery solved, he would
undoubtedly have replied in the affirmative. He would probably have
added that he never expected any such marvellous discovery to be made in
his lifetime.
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