Orson Scott Card quote: “Nature can't evolve a species that hasn't the will to survive. Individuals might be bred to sacrifice themselves, but t…”

“It is the preservation of the species, not of individuals, which appears to be the design of Deity throughout the whole of nature.”

Mary Wollstonecraft book Letters Written During a Short Residence in Sweden, Norway, and Denmark

Letter 22
Letters Written in Sweden (1796)

“As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring struggle for existence, it follows that any being, if it vary however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected.”

Charles Darwin book On the Origin of Species (1859)

From the strong principle of inheritance, any selected variety will tend to propagate its new and modified form.
"Introduction", page 5 http://darwin-online.org.uk/content/frameset?pageseq=20&itemID=F373&viewtype=image
On the Origin of Species (1859)

“By this time the whole world should know that the real Bible has not yet been written, but is being written, and that it will never be finished until the race begins its downward march, or ceases to exist.”

Robert G. Ingersoll (1833–1899) Union United States Army officer

Heretics and Heresies (1874)
Context: By this time the whole world should know that the real Bible has not yet been written, but is being written, and that it will never be finished until the race begins its downward march, or ceases to exist.
The real Bible is not the work of inspired men, nor prophets, nor apostles, nor evangelists, nor of Christs. Every man who finds a fact, adds, as it were, a word to this great book. It is not attested by prophecy, by miracles or signs. It makes no appeal to faith, to ignorance, to credulity or fear. It has no punishment for unbelief, and no reward for hypocrisy. It appeals to man in the name of demonstration. It has nothing to conceal. It has no fear of being read, of being contradicted, of being investigated and understood. It does not pretend to be holy, or sacred; it simply claims to be true. It challenges the scrutiny of all, and implores every reader to verify every line for himself. It is incapable of being blasphemed. This book appeals to all the surroundings of man. Each thing that exists testifies of its perfection. The earth, with its heart of fire and crowns of snow; with its forests and plains, its rocks and seas; with its every wave and cloud; with its every leaf and bud and flower, confirms its every word, and the solemn stars, shining in the infinite abysses, are the eternal witnesses of its truth.