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Updated: May 25, 2025
For with natural selection discredited in the house of its friends, and Lamarckianism under grave suspicion from want of a single well authenticated example, it is hard to see what there is left of the biological doctrine that has so dominated scientific thought for a half century.
In sharp contrast to Lamarckianism, so called, although it did not originate in the mind of the noted man of science whose name it bears, is the doctrine of natural selection, first proposed in its full form by Charles Darwin.
As we have stated earlier, Lamarckianism is the name given to the doctrine that modifications other than those due to congenital factors may enter into the heritage of a species, and may add themselves to those already combined as the peculiar characteristics of a particular species. Let us take the giraffe and its long neck as a concrete example.
He will smile, perhaps, when I tell him that Weismann cut off the tails of endless mice, and, breeding them together, found that tails invariably decorated the race as before. I remember hearing Mr. Bernard Shaw comment on this experiment. He was defending the Lamarckianism of Samuel Butler, who declared that our heredity was a kind of race-memory, a lapsed intelligence. "Why," said Mr.
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