"Every species has come into existence coincident both in space and time with a pre-existing closely allied species."
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"On the Law which has Regulated the Introduction of New Species" (1855).
https://en.wikiquote.org/wiki/Alfred_Russel_Wallace
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Alfred Russel Wallace
Alfred Russel Wallace, OM, FRS (January 8 1823 – November 7 1913) was a British naturalist, explorer, geographer, anthropologist, and biologist. He independently proposed a theory of natural selection ("On the Tendency of Varieties to Depart Indefinitely From the Original Type") which prompted Charles Darwin to publish his own more developed and researched theory sooner than he had intended. Wallace is sometimes called the "father of biogeography".
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