It seems to me that for Darwin the pulsing of evolutionary rates was a strictly vertical phenomenon.
More Quotes from Ernst Mayr:
Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.Ernst Mayr
According to the concept of transformational evolution, first clearly articulated by Lamarck, evolution consists of the gradual transformation of organisms from one condition of existence to another.
Ernst Mayr
All I claimed was that when a drastic change occurs, it occurs in a relatively small and isolated population.
Ernst Mayr
Life is simply the reification of the process of living.
Ernst Mayr
Most modern authors failed to distinguish between two very different phenomena the production of a new taxon, and the production of a new phenotype.
Ernst Mayr
In those early years in New York when I was a stranger in a big city, it was the companionship and later friendship which I was offered in the Linnean Society that was the most important thing in my life.
Ernst Mayr
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