On the Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle for Life. (2nd edition)

CHAPTER III.

Chapter 376 wordsPublic domain

STRUGGLE FOR EXISTENCE.

Its bearing on natural selection--The term used in a wide sense--Geometrical powers of increase--Rapid increase of naturalised animals and plants--Nature of the checks to increase--Competition universal--Effects of climate--Protection from the number of individuals--Complex relations of all animals and plants throughout nature--Struggle for life most severe between individuals and varieties of the same species; often severe between species of the same genus--The relation of organism to organism the most important of all relations

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