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From Herbert Spencer 22 February 1860
Summary
CD has caused a great change in HS’s views, in showing how a great proportion of adaptation should be explained by natural selection not direct adaptation to changing conditions. HS had remarked on the survival of the best individuals as a cause of improvement in man, but he "& every one" overlooked selection of spontaneous variation. Believes so many kinds of indirect evidence must add up to a conclusive demonstration of the doctrine.
Author: | Herbert Spencer |
Addressee: | Charles Robert Darwin |
Date: | 22 Feb 1860 |
Classmark: | The University of Edinburgh Centre for Research Collections (Lyell collection Coll-203/A3/5: 107–9) |
Letter no: | DCP-LETT-2706B |