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On the Origin of Species

Charles Darwin's On the Origin of Species (1859) is one of the most consequential books ever written, presenting the theory of evolution by natural selection. Drawing on breeding, biogeography, embryology, and the fossil record, Darwin argues that species are not fixed but descend with modification from common ancestors, shaped by the struggle for existence and the survival of favorable variations. It transformed biology and humanity's understanding of its place in nature.

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Contents

  1. Epigraphs
  2. Introduction
    1. Chapter I
    2. Chapter II
    3. Chapter III
    4. Chapter IV
    5. Chapter V
    6. Chapter VI
    7. Chapter VII
    8. Chapter VIII
    9. Chapter IX
    10. Chapter X
    11. Chapter XI
    12. Chapter XII
    13. Chapter XIII
    14. Chapter XIV