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Abstract. - Darwin's Theory of Evolution is the widely held notion that all life is related and has descended from a common ancestor: the birds and the bananas, the fishes and the flowers...
The origin of species. Evidence reported by lexw@archive.org for item originofspecies00darwuoft on March 14, 2008: visible notice of copyright; stated date is 1909. This book is available with additional data at Biodiversity Heritage Library.
The theory of evolution by natural selection is a theory about the mechanism by which evolution occurred in the past, and is still occurring now. The basic theory was developed by both Charles Darwin and Alfred Russel Wallace (1823–1913), however, Darwin gave a much fuller argument.
Mter commenting on Darwin's subject, the historical background to his work, and the character of mind that made it possible for him to discover and develop the theory of natural selection, I shall describe the one main evolutionary theory that stood as an alternative to Darwin's-the theory of Lamarck and Spencer. Turning
This theory explains the origin of the enormous organic diversity. It postulates that species multiply, either by splitting into daughter species or by ''budding,'' that is by the establishment of , geographically isolated founder populations that evolve into new species.
This is the first edition of Darwin's most famous work and one of the most influential books in history. It was published on 24 November 1859. A PDF version is here. Many more editions and translations are available in Darwin Online than anywhere else, see Publications: Origin.
Charles Darwin developed his basic theory of evolution by natural selection in 1838, shortly after he returned from the voyage of the Beagle and married Emma Wedgewood (she was an heir to the Wedgewood China family, owners of the pioneering 19th century manufacturing enterprise).