Darwinism (1889) by Alfred Russel Wallace
page 7 of 650 (01%)
page 7 of 650 (01%)
|
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 CHAPTER II THE STRUGGLE FOR EXISTENCE 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 CHAPTER III THE VARIABILITY OF SPECIES IN A STATE OF NATURE |
|