Eugenius Warming - Warming and Evolution

Warming and Evolution

Warming was a firm believer in adaptation. However, he was a declared Lamarckist. In his popularizing book Nedstamningslæren (The theory of decendence; 1915), he reviewed the direct and indirect evidence for common decent of living organisms and for Darwinian natural selection as a process involved in speciation. His keen observations of how differently the same plant is grown under different circumstances (now known as phenotypic plasticity) led him to question the change of species by infinitesimally small steps as advocated by his contemporary Darwinists of the Biometry school, e.g. Karl Pearson. Warming summarized his view on the ways in which new species could may arise: 1) By inheritance of acquired characters; 2) By hybridization; 3) By natural selection, with the latter mechanism being the least important.

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