Transcription of Chapter 13: The Five Forces Behind Human Evolution
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Chapter 13: The Five Forces Behind Human Evolution
1998, 1999, 2000 Gregory CareyChapter 13: five Forces - 1 Chapter 13: The five Forces Behind Human EvolutionIntroductionFive different Forces have influenced Human Evolution : natural selection , randomgenetic drift , mutation , population mating structure, and culture. All evolutionary biologistsagree on the first three of these Forces , although there have been disputes at times about therelative importance of each force . The fourth and fifth Forces are new in the sense that theyare not explicated in more traditional texts. This is not an attempt to develop a new theory of Human Evolution . Instead, the Forces of population mating structure and cultureare arbitrary categorizations used to organize several different phenomena of humanevolution. Scientists agree on the phenomena themselves, although they do not alwaysorganize them the same of the five Forces will be explained in turn. This is a risky approach because itcan lead to the false impression that the five operate quite distinctly and differently fromeach other.
Five different forces have influenced human evolution: natural selection, random genetic drift, mutation, population mating structure, and culture. All evolutionary biologists ... Genetic variation fuels natural selection and genetic inheritance transmits adaptive traits from one generation to the next. If all the members of a species were ...
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