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Darwin's two theories, 1844 and 1859.

Derek Partridge1,2

  • 1University of Exeter, Exeter, UK. d.partridge@exeter.ac.uk.

Journal of the History of Biology
|April 7, 2018
PubMed
Summary

Charles Darwin

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Area of Science:

  • Evolutionary Biology
  • History of Science

Background:

  • Darwin's early evolutionary ideas were presented in his 1844 Essay and his 1859 book, On the Origin of Species.
  • Both works proposed theories of evolution by natural selection.

Discussion:

  • The 1844 theory proposed adaptation during intervals of instability.
  • The 1859 theory posits continuous adaptation for all organisms.
  • Natural selection's role differs significantly between the two theories.

Key Insights:

  • Darwin's 1859 theory is not a mature version of his 1844 theory.
  • The Origin of Species introduced a new scientific paradigm.
  • The 1844 Essay contained flawed theorizing on species formation.

Outlook:

  • Darwin's delayed publication may reflect astute technical judgment.
  • Avoids rushing flawed evolutionary theories.
  • Highlights the distinct nature of Darwin's early and later evolutionary ideas.
Keywords:
1844 Essay1859 Origin of SpeciesDarwinEvolution by natural selection