The expression often used by Mr. Herbert Spencer of the Survival of the Fittest is more accurate, and is sometimes equally convenient.1
The Origin of Species. Chap. iii.
Note 1. This survival of the fittest which I have here sought to express in mechanical terms, is that which Mr. Darwin has called natural selection, or the preservation of favoured races in the struggle for life.Herbert Spencer: Principles of Biology. Indirect Equilibration. [back]