With savages, the weak in body or mind are soon eliminated. We civilized men, on the other hand, do our utmost to check the process of elimination. We build asylums for the imbecile, the maimed and the sick. Thus the weak members of civilized societies propagate their kind. No one who has attended to the breeding of domestic animals will doubt that this must be highly injurious to the race of man. Hardly anyone is so ignorant as to allow his worst animals to breed.
Charles DarwinIt is not the most intellectual of the species that survives; it is not the strongest that survives; but the species that survives is the one that is able best to adapt and adjust to the changing environment in which it finds itself.
Charles DarwinI shall always feel respect for every one who has written a book, let it be what it may, for I had no idea of the trouble which trying to write common English could cost oneโAnd alas there yet remains the worst part of all correcting the press.
Charles Darwin