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The mutation of bacteria and viruses are merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect.

— Pierre-Paul Grassé Evolution of living organisms: evidence for a new theory of transformation (1977)

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Notes from Wikiquote

Pierre Paul Grassé¨(1973). L'évolution du vivant: matériaux pour une nouvelle théorie transformiste. A. Michel,. p. 151

More quotes by Pierre-Paul Grassé

"Chance is only the measure of our ignorance."

Evolution of living organisms: evidence for a new theory of transformation (1977)

A given phenomenon, today considered random, may tomorrow be considered determined because its causes will have been unraveled by thorough and specific study.

Evolution of living organisms: evidence for a new theory of transformation (1977)

Natural order was not invented by the human mind or set up by certain perceptive powers... The existence of order presupposes the existence of organizing intelligence. Such intelligence can be none other than God's.

The study of contemporary species does not establish the existence of evolution; it provides facts which support it, but which do not fully demonstrate its existence. This is understandable, since at present we cannot show the series of successive stages which make up evolution, but only a fleeting picture of evolution.

Evolution of living organisms: evidence for a new theory of transformation (1977)

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Quote text and notes from Wikiquote: Pierre-Paul Grassé (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.