. A critique of the theory of evolution. Evolution. 154 THEORY OF EVOLUTION Selection, then, has not produced anything new, but only more of certain kinds of indi-. FiG. 79. Curves showing how (hypothetically) selection might be supposed to bring about progress in direction of selection. (After Goldschmidt.) viduals. E^volution, however, means producing more new things, not more of what already exists. Darwin seems to have thought that the range of variation shown by the offspring of a given individual about that type of individual would be as wide as the range shown by the original population
. A critique of the theory of evolution. Evolution. 154 THEORY OF EVOLUTION Selection, then, has not produced anything new, but only more of certain kinds of indi-. FiG. 79. Curves showing how (hypothetically) selection might be supposed to bring about progress in direction of selection. (After Goldschmidt.) viduals. E^volution, however, means producing more new things, not more of what already exists. Darwin seems to have thought that the range of variation shown by the offspring of a given individual about that type of individual would be as wide as the range shown by the original population (fig. 79), but Galton's work has made it clear that this is not the case in a gen- eral or mixed population. If the offspring of individuals continued to show, as Darwin seems to have thought, as wide a range on each side of their parents' size, so to speak, as did the orig- inal population, then it would follow that se-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Morgan, Thomas Hunt, 1866-1945. Princeton, Princeton University Press; [etc. , etc. ]
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