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 great powers of
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.



There is perhaps no phenomenon of nature that is at once so important,
so universal; and so little understood, as the struggle for existence
continually going on among all organised beings. To most persons nature
appears calm, orderly, and peaceful. They see the birds singing in the
trees, the insects hovering over the flowers, the squirrel climbing
among the tree-tops, and all living things in the possession of health
and vigour, and in the enjoyment of a sunny existence. But they do not
see, and hardly ever think of, the means by which this beauty and
harmony and enjoyment is brought about. They do not see the constant and
daily search after food, the failure to obtain which means weakness or
death; the constant effort to escape enemies; the ever-recurring
struggle against the forces of nature. This daily and hourly struggle,
this incessant warfare, is nevertheless the very means by which much of