"I think, then, that man, after having satisfied his first longing for facts, wanted something fuller - some grouping, some adaptation to his capacity and experience, of the links of this vast chain of events which his sight could not take in."

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As a consequence, geneticists described evolution simply as a change in gene frequencies in populations, totally ignoring the fact that evolution consists of the two simultaneous but quite separate phenomena of adaptation and diversification.

— Ernst Mayr