Several days later Darwin again wrote to Sir Charles Lyell:-
Charles Darwin himself in his Autobiography (1887) wrote:-
Editor's Note: This story, originally published in the July 2000 issue of Scientific American, is being made available due to the 150th anniversary of Charles Darwin's On the Origin of the Species
To quote Charles Darwin, (from his Autobiography), again:-
The situation differs dramatically with regard to concepts in biology. Many biological ideas proposed during the past 150 years stood in stark conflict with what everybody assumed to be true. The acceptance of these ideas required an ideological revolution. And no biologist has been responsible for more—and for more drastic—modifications of the average person’s worldview than Charles Darwin.
Essay on Charles Darwin's Theory of Evolution.
In a covering letter Wallace asked that Darwin forward the memoir to a famous scientist, Sir Charles Lyell, if Darwin thought the content merited his attention.
Darwins theory of evolutions influence on modern psychology
And so it was that Wallace sent a twenty page long memoir about this evolutionary theory to the influential expertnaturalist Charles Darwin, arrived in Darwin's hands in June 1858.
(How did Thomas Malthus influence Charles Darwin?)
In this way every part of an animal's organization could be modified exactly as required, and in the very process of this modification the unmodified would die out, and thus the definite characters and the clear isolation of each new species would be explained.