Quotes from book
The Descent of Man, and Selection in Relation to Sex

The Descent of Man, and Selection in Relation to Sex

Charles Darwin

The Descent of Man, and Selection in Relation to Sex is a book by English naturalist Charles Darwin, first published in 1871, which applies evolutionary theory to human evolution, and details his theory of sexual selection, a form of biological adaptation distinct from, yet interconnected with, natural selection. The book discusses many related issues, including evolutionary psychology, evolutionary ethics, differences between human races, differences between sexes, the dominant role of women in mate choice, and the relevance of the evolutionary theory to society.

“Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, "Introduction", page 3 http://darwin-online.org.uk/content/frameset?pageseq=16&itemID=F937.1&viewtype=image
Source: The Descent of Man (1871)
Context: It has often and confidently been asserted, that man's origin can never be known: but ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.

“Disinterested love for all living creatures, the most noble attribute of man.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter III: "Comparison of the Mental Powers of Man and the Lower Animals — continued", page 105 http://darwin-online.org.uk/content/frameset?pageseq=118&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“We are not here concerned with hopes or fears, only with truth as far as our reason permits us to discover it.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

Source: The Descent of Man

“Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter III: "Comparison of the Mental Powers of Man and the Lower Animals — continued", pages 100-101 http://darwin-online.org.uk/content/frameset?pageseq=113&itemID=F937.1&viewtype=image
The Descent of Man (1871)
Context: As man advances in civilisation, and small tribes are united into larger communities, the simplest reason would tell each individual that he ought to extend his social instincts and sympathies to all the members of the same nation, though personally unknown to him. This point being once reached, there is only an artificial barrier to prevent his sympathies extending to the men of all nations and races. If, indeed, such men are separated from him by great differences in appearance or habits, experience unfortunately shews us how long it is before we look at them as our fellow-creatures. Sympathy beyond the confines of man, that is humanity to the lower animals, seems to be one of the latest moral acquisitions. It is apparently unfelt by savages, except towards their pets. How little the old Romans knew of it is shewn by their abhorrent gladiatorial exhibitions. The very idea of humanity, as far as I could observe, was new to most of the Gauchos of the Pampas. This virtue, one of the noblest with which man is endowed, seems to arise incidentally from our sympathies becoming more tender and more widely diffused, until they are extended to all sentient beings. As soon as this virtue is honoured and practised by some few men, it spreads through instruction and example to the young, and eventually through public opinion.

“We must, however, acknowledge, as it seems to me, that man with all his noble qualities… still bears in his bodily frame the indelible stamp of his lowly origin.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 405 http://darwin-online.org.uk/content/frameset?pageseq=422&itemID=F937.2&viewtype=image
(Closing paragraph of the book.)
The Descent of Man (1871)
Context: Man may be excused for feeling some pride at having risen, though not through his own exertions, to the very summit of the organic scale; and the fact of his having thus risen, instead of having been aboriginally placed there, may give him hopes for a still higher destiny in the distant future. But we are not here concerned with hopes or fears, only with the truth as far as our reason allows us to discover it. I have given the evidence to the best of my ability; and we must acknowledge, as it seems to me, that man with all his noble qualities, with sympathy which feels for the most debased, with benevolence which extends not only to other men but to the humblest living creature, with his god-like intellect which has penetrated into the movements and constitution of the solar system — with all these exalted powers — Man still bears in his bodily frame the indelible stamp of his lowly origin.

“The highest stage in moral culture at which we can arrive, is when we recognise that we ought to control our thoughts.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter III: "Comparison of the Mental Powers of Man and the Lower Animals — continued", page 101 http://darwin-online.org.uk/content/frameset?pageseq=114&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“The love of a dog for his master is notorious; in the agony of death he has been known to caress his master, and every one has heard of the dog suffering under vivisection, who licked the hand of the operator; this man, unless he had a heart of stone, must have felt remorse to the last hour of his life.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter II: "Comparison of the Mental Powers of Man and the Lower Animals", page 40 http://darwin-online.org.uk/content/frameset?pageseq=53&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“There is, however, no doubt that the various races, when carefully compared and measured, differ much from each other,—as in the texture of the hair, the relative proportions of all parts of the body,2 the capacity of the lungs, the form and capacity of the skull, and even in the convolutions of the brain.3 But it would be an endless task to specify the numerous points of structural difference. The races differ also in constitution, in acclimatisation, and in liability to certain diseases. Their mental characteristics are likewise very distinct; chiefly as it would appear in their emotional, but partly in their intellectual, faculties. Every one who has had the opportunity of comparison, must have been struck with the contrast between the taciturn, even morose, aborigines of S. America and the light-hearted, talkative negroes. There is a nearly similar contrast between the Malays and the Papuans,4 who live under the same physical conditions, and are separated from each other only by a narrow space of sea.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter VII: "On the Races of Man", page 216 http://darwin-online.org.uk/content/frameset?pageseq=238&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“Through the means just specified, aided perhaps by others as yet undiscovered, man has been raised to his present state. But since he attained to the rank of manhood, he has diverged into distinct races, or as they may be more appropriately called sub-species. Some of these, for instance the Negro and European, are so distinct that, if specimens had been brought to a naturalist without any further information, they would undoubtedly have been considered by him as good and true species. Nevertheless all the races agree in so many unimportant details of structure and in so many mental peculiarities, that these can be accounted for only through inheritance from a common progenitor; and a progenitor thus characterised would probably have deserved to rank as man.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 388 http://darwin-online.org.uk/content/frameset?pageseq=405&itemID=F937.2&viewtype=image
The Descent of Man (1871)

“False facts are highly injurious to the progress of science, for they often long endure; but false views, if supported by some evidence, do little harm, as every one takes a salutary pleasure in proving their falseness; and when this is done, one path towards error is closed and the road to truth is often at the same time opened.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 385 http://darwin-online.org.uk/content/frameset?pageseq=402&itemID=F937.2&viewtype=image
The Descent of Man (1871)

“Most of the more complex emotions are common to the higher animals and ourselves. Every one has seen how jealous a dog is of his master's affection, if lavished on any other creature; and I have observed the same fact with monkeys. This shews that animals not only love, but have the desire to be loved.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter II: "Comparison of the Mental Powers of Man and the Lower Animals", pages 41-42 http://darwin-online.org.uk/content/frameset?pageseq=54&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“With highly civilised nations continued progress depends in a subordinate degree on natural selection; for such nations do not supplant and exterminate one another as do savage tribes. Nevertheless the more intelligent members within the same community will succeed better in the long run than the inferior, and leave a more numerous progeny, and this is a form of natural selection. The more efficient causes of progress seem to consist of a good education during youth whilst the brain is impressible, and of a high standard of excellence, inculcated by the ablest and best men, embodied in the laws, customs and traditions of the nation, and enforced by public opinion. It should, however, be borne in mind, that the enforcement of public opinion depends on our appreciation of the approbation and disapprobation of others; and this appreciation is founded on our sympathy, which it can hardly be doubted was originally developed through natural selection as one of the most important elements of the social instincts.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter V: "On the Development of the Intellectual and Moral Faculties during Primeval and Civilised Times" (second edition, 1874) page 143 http://darwin-online.org.uk/content/frameset?pageseq=166&itemID=F944&viewtype=image
The Descent of Man (1871)

“Man differs from woman in size, bodily strength, hairyness, &c., as well as in mind, in the same manner as do the two sexes of many mammals.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume I, chapter I: "The Evidence of the Descent of Man from some Lower Form", pages 13-14 http://darwin-online.org.uk/content/frameset?pageseq=26&itemID=F937.1&viewtype=image
The Descent of Man (1871)

“The moral faculties are generally esteemed, and with justice, as of higher value than the intellectual powers. But we should always bear in mind that the activity of the mind in vividly recalling past impressions is one of the fundamental though secondary bases of conscience. This fact affords the strongest argument for educating and stimulating in all possible ways the intellectual faculties of every human being.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

volume II, chapter XXI: "General Summary and Conclusion", page 393 http://darwin-online.org.uk/content/frameset?pageseq=410&itemID=F937.2&viewtype=image
The Descent of Man (1871)

“There can be little doubt that the greater size and strength of man, in comparison with woman, together with his broader shoulders, more developed muscles, rugged outline of body, his greater courage and pugnacity, are all due in chief part to inheritance from his half-human male ancestors. These characters would, however, have been preserved or even augmented during the long ages of man's savagery, by the success of the strongest and boldest men, both in the general struggle for life and in their contests for wives; a success which would have ensured their leaving a more numerous progeny than their less favoured brethren.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

second edition (1874), chapter XIX: "Secondary Sexual Characters of Man", page 563 http://darwin-online.org.uk/content/frameset?pageseq=586&itemID=F944&viewtype=image
The Descent of Man (1871)

“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.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

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.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

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.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

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)

“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.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

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)

“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.”

Charles Darwin book The Descent of Man, and Selection in Relation to Sex

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)

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