'''George Gaylord Simpson''' was a Harvard paleontologist
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'''George Gaylord Simpson''' was one of the great American paleontologists of the 20th century. In countless scientific papers and in books such as <i>Tempo and Mode in Evolution</i> and <i>The Meaning of Evolution</i>, he revolutionized the study of evolutionary paleontology.
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{{quotebox|Although many details remain to be worked out, it is already evident that all objective phenomena of the history of life can be explained by purely [[naturalistic]] or, in a proper sense of the sometimes abused word, [[materialistic]] factors. They are readily explicable on the basis of differential reproduction in populations and the mainly random interplay of the known processes of heredity. Therefore, man is the result of a purposeless and natural process that did not have him in mind. - G. Simpson, Meaning of Evolution, p. 345}}