"I am almost convinced (quite contrary to opinion I started with) that species are not (it is like confessing a murder) immutable."
— Charles Darwin

January 1, 1970

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Naturalists from EnglandAgnosticsScience authorsBiologists from EnglandGeologists from England
Original Language: English

Sources

volume II, chapter II: "The Growth of the 'Origin of Species' — 1843-1856", page 23; letter to J.D. Hooker (11 January 1844)