Publisher's Synopsis
Excerpt from The Direct Action of Environment and Evolution
Herbert Spencer had already come to this conclusion, only giving even more importance to the first factor: The foregoing chapters, he wrote, in the second enlarged edition of his principles of Biology, imply that neither extreme (i. E natural selection alone, or the direct action of environment Without the aid of natural selection) is here adopted. Agreeing with Mr. Darwin that both factors have been operative, I hold that the inheritance of functionally caused alterations has played a larger part 'than he admitted even at the close of his life; and that, coming more to the front as evolution has advanced, it has played the chief part in producing the highest types.
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