The origin of species

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An historical sketch: of the progress of opinion on the origin of species

Variation under domestication

Variation under nature

Struggle for existence

Natural selection, or the survival of the fittest

Laws of variation

Difficulties of the theory

Miscellaneous objections to the theory of natural selection

Instinct

Hybridism

On the imperfection of the geological record

On the geological succession of organic beings

Geographical distribution

Geographical distribution-continued

Mutual affinities of organic beings: morphology: embryology: rudimentary organs

Recapitulation and conclusion