Natural Quote by Charles Darwin

I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection, in order to mark its…

— Charles Darwin

... if variations useful to any organic being do occur, assuredly individuals thus characterized will have the best chance of being perserved in the…

— Charles Darwin

This preservation of favourable variations and the destruction of injurious variations, I call Natural Selection, or the Survival of the Fittest. Variations neither useful…

— Charles Darwin

Natural selection acts solely by accumulating slight successive favorable variations, it can produce no great or sudden modification; it can act only by very…

— Charles Darwin

Evolution thus is merely contingent on certain processes articulated by Darwin: variation and selection.

— Ernst Mayr

“Natural selection is a blind and undirected consequence of the interaction between variation and the environment. Natural selection exists only in the continuous present…

— Henry Gee

Although much remains obscure, and will long remain obscure, ... I am convinced that Natural Selection has been the main but not exclusive means…

— Charles Darwin

The basic formulation, or bare-bones mechanics, of natural selection is a disarmingly simple argument, based on three undeniable facts (overproduction of offspring, variation, and…

— Stephen Jay Gould

“Natural Selection almost inevitably causes much Extinction of the less improved forms of life and induces what I have called Divergence of Character.”

— Charles Darwin

Natural selection is a theory of local adaptation to changing environments. It proposes no perfecting principles, no guarantee of general improvement

— Stephen Jay Gould

Natural selection eliminates and maybe maintains, but it doesn't create.

— Lynn Margulis

Natural selection based on the differential multiplication of variant types cannot exist before there is material capable of replicating itself and its own variations,…

— Hermann Joseph Muller