But a plant on the edge of a deserts is said to struggle for life against the drought, though more properly it should be said to be dependent upon the moisture.
As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected. From the strong principle of inheritance, any selected variety wil..
The earthquake, however, must be to every one a most impressive event: the earth, considered from our earliest childhood as the type of solidity, has oscillated like a thin crust beneath our feet; and in seeing the laboured works of man in a moment overthrown, we feel the insignificance of his boasted power.
A grain in the balance will determine which individual shall live and which shall die - which variety or species shall increase in number, and which shall decrease, or finally become extinct.
The only distinct meaning of the word 'natural' is STATED, FIXED or SETTLED; since what is natural as much requires and presupposes an intelligent agent to render it so, i.e., to effect it continually or at stated times, as what is supernatural or miraculous does to effect it for once."--Butler: "Analogy of Revealed Religion"." --
he importance and influence of Charles Darwin's theory of evolution by natural selection can scarcely be exaggerated. A century after Darwin's death, the great evolutionary biologist and historian of science, Ernst Mayr, wrote, 'The worldview formed by any thinking person in the Western world after 1859, when On the Origin of Species was published, was by necessity quite different from a worldview formed prior to 1859... The intellectual re..