Ernst Mayr

...definitions are temporary verbalizations of concepts, and concepts- particularly difficult concepts- are usually revised repeatedly as our knowledge and understanding read more

...definitions are temporary verbalizations of concepts, and concepts- particularly difficult concepts- are usually revised repeatedly as our knowledge and understanding grows.

Every politician, clergyman, educator, or physician, in short, anyone dealing with human individuals, is bound to make grave mistakes if read more

Every politician, clergyman, educator, or physician, in short, anyone dealing with human individuals, is bound to make grave mistakes if he ignores these two great truths of population zoology: (1) no two individuals are alike, and (2) both environment and genetic endowment make a contribution to nearly every trait.

The history of science knows scores of instances where an investigator was in the possession of all the important facts read more

The history of science knows scores of instances where an investigator was in the possession of all the important facts for a new theory but simply failed to ask the right questions.

Life is simply the reification of the process of living.

Life is simply the reification of the process of living.

...democracy can be interpreted to assert not only equality before the law but also essentialistic identity in all respects. This read more

...democracy can be interpreted to assert not only equality before the law but also essentialistic identity in all respects. This is expressed in the claim, "All men are created equal," which is something very different from the statement, "All men have equal rights and are equal before the law." Anyone who believes in the genetic uniqueness of every individual thereby believes in the conclusion, "No two individuals are created equal.".