Species evolve exactly as if they were adapting as best they could to a changing world, and not at all as if they were moving toward a set goal.
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About George Gaylord Simpson
George Gaylord Simpson was a 20th-century American paleontologist. George Gaylord Simpson was an American paleontologist. Simpson was perhaps the most influential paleontologist of the twentieth century, and a major participant in the modern synthesis, contributing Tempo and Mode in Evolution (1944), The Meaning of Evolution (1949) and The Major Features of Evolution (1953). Read more on Wikipedia →