Charles Darwin: Frasi in inglese (pagina 5)

“Now when naturalists observe a close agreement in numerous small details of habits, tastes and dispositions between two or more domestic races, or between nearly-allied natural forms, they use this fact as an argument that all are descended from a common progenitor who was thus endowed; and consequently that all should be classed under the same species. The same argument may be applied with much force to the races of man.

As it is improbable that the numerous and unimportant points of resemblance between the several races of man in bodily structure and mental faculties (I do not here refer to similar customs) should all have been independently acquired, they must have been inherited from progenitors who were thus characterised.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume I, chapter VII: "On the Races of Man", page 233 http://darwin-online.org.uk/content/frameset?pageseq=246&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“As dogs, cats, horses, and probably all the higher animals, even birds, as is stated on good authority, have vivid dreams, and this is shewn by their movements and voice, we must admit that they possess some power of imagination. … Few persons any longer dispute that animals possess some power of reasoning. Animals may constantly be seen to pause, deliberate, and resolve. It is a significant fact, that the more the habits of any particular animal are studied by a naturalist, the more he attributes to reason and the less to unlearnt instincts.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume I, chapter II: "Comparison of the Mental Powers of Man and the Lower Animals", page 46 http://darwin-online.org.uk/content/frameset?pageseq=59&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“Amongst the half-human progenitors of man, and amongst savages, there have been struggles between the males during many generations for the possession of the females. But mere bodily strength and size would do little for victory, unless associated with courage, perseverance, and determined energy. With social animals, the young males have to pass through many a contest before they win a female, and the older males have to retain their females by renewed battles. They have, also, in the case of mankind, to defend their females, as well as their young, from enemies of all kinds, and to hunt for their joint subsistence. But to avoid enemies or to attack them with success, to capture wild animals, and to fashion weapons, requires the aid of the higher mental faculties, namely, observation, reason, invention, or imagination. These various faculties will thus have been continually put to the test and selected during manhood; they will, moreover, have been strengthened by use during this same period of life. Consequently, in accordance with the principle often alluded to, we might expect that they would at least tend to be transmitted chiefly to the male offspring at the corresponding period of manhood.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

second edition (1874), chapter XIX: "Secondary Sexual Characters of Man", page 564 http://darwin-online.org.uk/content/frameset?pageseq=587&itemID=F944&viewtype=image
The Descent of Man (1871)

“The expression often used by Mr. Herbert Spencer of the Survival of the Fittest is more accurate, and is sometimes equally convenient.”

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Charles Darwin libro L'origine delle specie

Compare: "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, The Principles of Biology (1864) volume 1, part III: "The Evolution of Life", chapter XII, "Indirect Equilibration", pages 444-445.
Origine: On the Origin of Species (1859), chapter III: "Struggle For Existence", page 72 http://darwin-online.org.uk/content/frameset?pageseq=101&itemID=F387&viewtype=image, in the fifth (1869) and sixth (1872) editions

“But just in proportion as this process of extermination has acted on an enormous scale, so must the number of intermediate varieties, which have formerly existed on the earth, be truly enormous. Why then is not every geological formation and every stratum full of such intermediate links? Geology assuredly does not reveal any such finely graduated organic chain; and this, perhaps, is the most obvious and gravest objection which can be urged against my theory. The explanation lies, as I believe, in the extreme imperfection of the geological record.”

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Charles Darwin libro L'origine delle specie

Origine: On the Origin of Species (1859), chapter IX: "On the Imperfection of the Geological Record", page 280 http://darwin-online.org.uk/content/frameset?pageseq=298&itemID=F373&viewtype=image

“With mankind the differences between the sexes are greater than in most species of Quadrumana, but not so great as in some, for instance, the mandrill. Man on an average is considerably taller, heavier, and stronger than woman, with squarer shoulders and more plainly-pronounced muscles. … Man is more courageous, pugnacious, and energetic than woman, and has a more inventive genius. His brain is absolutely larger, but whether relatively to the larger size of his body, in comparison with that of woman, has not, I believe been fully ascertained. In woman the face is rounder; the jaws and the base of the skull smaller; the outlines of her body rounder, in parts more prominent; and her pelvis is broader than in man; but this latter character may perhaps be considered rather as a primary than a secondary sexual character. She comes to maturity at an earlier age than man.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume II, chapter XIX: "Secondary Sexual Characters of Man", pages 316-317 http://darwin-online.org.uk/content/frameset?pageseq=333&itemID=F937.2&viewtype=image
The Descent of Man (1871)

“In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.”

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Charles Darwin

This related misquote http://www.darwinproject.ac.uk/six-things-darwin-never-said appeared in The Living Clocks (1971) by Ritchie R. Ward.
Misattributed

“It is easy to specify the individual objects of admiration in these grand scenes; but it is not possible to give an adequate idea of the higher feelings of wonder, astonishment, and devotion, which fill and elevate the mind.”

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Charles Darwin libro Viaggio di un naturalista intorno al mondo

Origine: The Voyage of the Beagle (1839), chapter II, "Rio de Janeiro", 18 April 1832, page 29 http://darwin-online.org.uk/content/frameset?viewtype=image&itemID=F11&pageseq=48

“Man bears in his bodily structure clear traces of his descent from some lower form; but it may be urged that, as man differs so greatly in his mental power from all other animals, there must be some error in this conclusion. No doubt the difference in this respect is enormous, even if we compare the mind of one of the lowest savages, who has no words to express any number higher than four, and who uses no abstract terms for the commonest objects or affections, with that of the most highly organised ape.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume I, chapter II: "Comparison of the Mental Powers of Man and the Lower Animals", page 34 http://darwin-online.org.uk/content/frameset?pageseq=47&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“Worms seize leaves and other objects, not only to serve as food, but for plugging up the mouths of their burrows; and this is one of their strongest instincts.”

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Charles Darwin libro The Formation of Vegetable Mould through the Action of Worms

Origine: The Formation of Vegetable Mould through the Action of Worms (1881), Chapter 2: Habits of Worms, p. 58. http://darwin-online.org.uk/content/frameset?pageseq=73&itemID=F1357&viewtype=image

“The great break in the organic chain between man and his nearest allies, which cannot be bridged over by any extinct or living species, has often been advanced as a grave objection to the belief that man is descended from some lower form; but this objection will not appear of much weight to those who, convinced by general reasons, believe in the general principle of evolution. Breaks incessantly occur in all parts of the series, some being wide, sharp and defined, others less so in various degrees; as between the orang and its nearest allies—between the Tarsius and the other Lemuridæ—between the elephant and in a more striking manner between the Ornithorhynchus or Echidna, and other mammals. But all these breaks depend merely on the number of related forms which have become extinct. At some future period, not very distant as measured by centuries, the civilised races of man will almost certainly exterminate and replace throughout the world the savage races. At the same time the anthropomorphous apes, as Professor Schaaffhausen has remarked, will no doubt be exterminated. The break will then be rendered wider, for it will intervene between man in a more civilised state, as we may hope, than the Caucasian, and some ape as low as a baboon, instead of as at present between the negro or Australian and the gorilla.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume I, chapter VI: "On the Affinities and Genealogy of Man", pages 200-201 http://darwin-online.org.uk/content/frameset?pageseq=213&itemID=F937.1&viewtype=image
The sentence "At some future period … the savage races" is often quoted out of context to suggest that Darwin desired this outcome, whereas in fact Darwin simply held that it would occur.
The Descent of Man (1871)

“I love fools' experiments. I am always making them.”

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Charles Darwin

recollection http://darwin-online.org.uk/content/frameset?itemID=F2113&viewtype=text&pageseq=7 by E. Ray Lankester, from his essay "Charles Robert Darwin" in C.D. Warner, editor, Library of the World's Best Literature: Ancient and Modern (R.S. Peale & J.A. Hill, New York, 1896) volume 2, pages 4835-4393, at page 4391
Other letters, notebooks, journal articles, recollected statements

“[Y]ou have expressed my inward conviction, though far more vividly and clearly than I could have done, that the Universe is not the result of chance. … Lastly, I could show fight on natural selection having done and doing more for the progress of civilization than you seem inclined to admit. Remember what risk the nations of Europe ran, not so many centuries ago of being overwhelmed by the Turks, and how ridiculous such an idea now is! The more civilized so-called Caucasian races have beaten the Turkish hollow in the struggle for existence. Looking to the world at no very distant date, what an endless number of the lower races will have been eliminated by the higher civilized races throughout the world.”

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Charles Darwin

volume I, chapter VIII: "Religion", page 316 http://darwin-online.org.uk/content/frameset?pageseq=334&itemID=F1452.1&viewtype=image; letter to William Graham (3 July 1881)
The Life and Letters of Charles Darwin (1887)

“As for a future life, every man must judge for himself between conflicting vague probabilities.”

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Charles Darwin

volume I, chapter VIII: "Religion", page 307 http://darwin-online.org.uk/content/frameset?pageseq=325&itemID=F1452.1&viewtype=image; letter to an unidentified German student (1879)
The Life and Letters of Charles Darwin (1887)

“There should be open competition for all men; and the most able should not be prevented by laws or customs from succeeding best and rearing the largest number of offspring. Important as the struggle for existence has been and even still is, yet as far as the highest part of man's nature is concerned there are other agencies more important. For the moral qualities are advanced, either directly or indirectly, much more through the effects of habit, the reasoning powers, instruction, religion, &c., than through natural selection; though to this latter agency the social instincts, which afforded the basis for the development of the moral sense, may be safely attributed.”

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Charles Darwin libro L'origine dell'uomo e la selezione sessuale

volume II, chapter XXI: "General Summary and Conclusion", pages 403-404 http://darwin-online.org.uk/content/frameset?pageseq=420&itemID=F937.2&viewtype=image
The Descent of Man (1871)

“Believing as I do that man in the distant future will be a far more perfect creature than he now is, it is an intolerable thought that he and all other sentient beings are doomed to complete annihilation after such long-continued slow progress. To those who fully admit the immortality of the human soul, the destruction of our world will not appear so dreadful.”

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Charles Darwin

volume I, chapter VIII: "Religion", page 312 http://darwin-online.org.uk/content/frameset?pageseq=330&itemID=F1452.1&viewtype=image
The Life and Letters of Charles Darwin (1887)

“I believe that animals have descended from at most only four or five progenitors, and plants from an equal or lesser number.

Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype. But analogy may be a deceitful guide. Nevertheless all living things have much in common, in their chemical composition, their germinal vesicles, their cellular structure, and their laws of growth and reproduction. We see this even in so trifling a circumstance as that the same poison often similarly affects plants and animals; or that the poison secreted by the gall-fly produces monstrous growths on the wild rose or oak-tree. Therefore I should infer from analogy that probably all the organic beings which have ever lived on this earth have descended from some one primordial form, into which life was first breathed by the Creator.”

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Charles Darwin libro L'origine delle specie

Origine: On the Origin of Species (1859), chapter XIV: "Recapitulation and Conclusion", page 484 http://darwin-online.org.uk/content/frameset?pageseq=505&itemID=F376&viewtype=side, in the second (1860) edition

“I think it can be shown that there is such an unerring power at work in Natural Selection (the title of my book), which selects exclusively for the good of each organic being.”

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Charles Darwin

Darwin's first published expression of the concept of natural selection.
"On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection" Journal of the Proceedings of the Linnean Society of London: Zoology (read 1 July 1853; published 20 August 1858) volume 3, pages 45-62, at page 51 http://darwin-online.org.uk/content/frameset?pageseq=7&itemID=F350&viewtype=image
Other letters, notebooks, journal articles, recollected statements

“The subject may appear an insignificant one, but we shall see that it possesses some interest; and the maxim "de minimis lex non curat," does not apply to science.”

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Charles Darwin libro The Formation of Vegetable Mould through the Action of Worms

Introduction, p. 2. http://darwin-online.org.uk/content/frameset?pageseq=17&itemID=F1357&viewtype=image
de minimis non curat lex - The law does not concern itself with trifles.
The Formation of Vegetable Mould through the Action of Worms (1881)

“We will now discuss in a little more detail the struggle for existence.”

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Charles Darwin libro L'origine delle specie

Compare: "this perpetual struggle for room and food", The Reverend Thomas Malthus, An Essay on the Principle of Population (1798) section III.7 http://www.econlib.org/library/Malthus/malPop2.html#III.7.
Origine: On the Origin of Species (1859), chapter III: "Struggle For Existence", page 62 http://darwin-online.org.uk/content/frameset?pageseq=77&itemID=F373&viewtype=image