Natural Selection; or the Survival of the Fittest

Natural Selection: Its Power Compared with Man’s Selection

How will the struggle for existence, briefly discussed in the last chapter, act in regard to vari...

Sexual Selection.

Inasmuch as peculiarities often appear under domestication in one sex and become hereditarily att...

Illustrations of the Action of Natural Selection, or the Survival of the Fittest.

In order to make it clear how, as I believe, natural selection acts, I must beg permission to giv...

On the Intercrossing of Individuals.

I must here introduce a short digression. In the case of animals and plants with separated sexes,...

Circumstances favourable for the production of new forms through Natural Selection.

This is an extremely intricate subject. A great amount of variability, under which term individua...

Extinction caused by Natural Selection.

This subject will be more fully discussed in our chapter on Geology; but it must here be alluded ...

Divergence of Character.

The principle, which I have designated by this term, is of high importance, and explains, as I be...

The Probable Effects of the Action of Natural Selection through Divergence of Character and Extinction, on the Descendants of a Common Ancestor.

After the foregoing discussion, which has been much compressed, we may assume that the modified d...

On the degree to which organisation tends to advance.

Natural selection acts exclusively by the preservation and accumulation of variations, which are ...

Convergence of Character.

Mr. H. C. Watson thinks that I have overrated the importance of divergence of character (in which...

Summary of Chapter.

If under changing conditions of life organic beings present individual differences in almost ever...

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