TF: Pan Pan Jiang
THE O RIGIN OF THE SPECIES:C HAPTER 2(V ARIATION UNDER NATURE )
Why does Darwingo togreat lengthsto describethe extent of variationinnature?
Darwin needs to convince readers that enough variation is present in nature for natural selection to
act on, resulting in the current diversity of life. He draws a direct parallel between selection of
organisms in the wild to selection on domesticated organisms, stating “These individual differences
are highly important for us, as they afford materials for natural selection to accumulate, in the same
manner as man can accumulate in any given direction individual differences in his domesticated
How doesDarwintryto distinguish“species”from“varieties”?Ishesuccessful?
Darwin starts out with making the observation that naturalists have not been able to come to any
definite conclusion about what is considered a species and what is considered a variety. He reasons
that varieties may eventually become species if they become “strongly marked and more permanent
varieties”, with a variety becoming so numerous as to