Definition of species--Special creation--The early transmutationists--Scientific opinion before Darwin--The problem before Darwin--The change of opinion effected by Darwin--The Darwinian theory--Proposed mode of treatment of the subject Its importance--The struggle among plants--Among animals--Illustrative cases--Succession of trees in forests of Denmark--The struggle for existence on the Pampas--Increase of organisms in a geometrical ratio--Examples of rapid increase of animals--Rapid increase and wide spread of plants--Great fertility not essential to rapid increase--Struggle between closely allied species most severe--The ethical aspect of the struggle for existence…
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