“As if to demonstrate, by a striking example, the impossibility of erecting any cerebral barrier between man and the apes, Nature has provided us, in the latter animals, with an almost complete series of gradations from brains little higher than that of a Rodent, to brains little lower than that of Man.”

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 115

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Thomas Henry Huxley127

English biologist and comparative anatomist 1825–1895

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“So far as cerebral structure goes… it is clear that Man differs less from the Chimpanzee or the Orang, than these do even from the Monkeys, and that the difference between the brains of the Chimpanzee and of Man is almost insignificant, when compared with that between the Chimpanzee brain and that of a Lemur.”

Thomas Henry Huxley (1825–1895) English biologist and comparative anatomist

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 120

“It is said a fish as large as a man has a brain no larger than the kernel of an almond. In all fish and reptiles where there is no great brain development, there is also no conscious sexual control. The lower down in the scale of human development we go the less sexual control we find. It is said that the aboriginal Australian, the lowest known species of the human family, just a step higher than the chimpanzee in brain development, has so little sexual control that police authority alone prevents him from obtaining sexual satisfaction on the streets. According to one writer, the rapist has just enough brain development to raise him above the animal, but like the animal, when in heat knows no law except nature which impels him to procreate whatever the result. Every normal man and Woman has the power to control and direct his sexual impulse. Men and women who have it in control and constantly use their brain cells in thinking deeply, are never sensual.”

Margaret Sanger (1879–1966) American birth control activist, educator and nurse

Source: What Every Girl Should Know (1913), Chapter 4, "Sexual Impulses--Part II", p. 47.

“Whatever part of the animal fabric—whatever series of muscles, whatever viscera might be selected for comparison—the result would be the same—the lower Apes and the Gorilla would differ more than the Gorilla and the Man.”

Thomas Henry Huxley (1825–1895) English biologist and comparative anatomist

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 101

“Regarded anatomically, the resemblances between the foot of Man and the foot of the Gorilla are far more striking and important than the differences. …be the differences between the hand and foot of Man and those of the Gorilla what they may—the differences between those of the Gorilla and those of the lower Apes are much greater.”

Thomas Henry Huxley (1825–1895) English biologist and comparative anatomist

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 110

“We have to face the fact that we are the descendants of apelike ancestors. The truth, at first sight, is often ugly and repulsive to our personal feelings, but when it is the truth, its ultimate effects on us are always salutary. ...
... Man's brain does not stand as a thing apart; it is the culmination of an ascending series. There is no part of it and no function manifested by it that cannot be traced to humble beginnings lower in the animal scale. And what we postulate for man's brain we must in all justice apply to that of the ape, the dog, and all other beasts.”

Arthur Keith (1866–1955) anatomy, anthropology, geologist

[Chapter X, Living Philosophies, 149, 1931, Simon & Schuster]

“The evolution of the brain not only overshot the needs of prehistoric man, it is the only example of evolution providing a species with an organ which it does not know how to use.”

Arthur Koestler book The Ghost in the Machine

The Ghost in the Machine (1967).

“I saw that the writers on vegetarianism had examined the question very minutely, attacking it in its religious, scientific, practical and medical aspects. Ethically they had arrived at the conclusion that man's supremacy over the lower animals meant not that the former should prey upon the latter, but that the higher should protect the lower, and that there should be mutual aid between the two as between man and man.”

Mahatma Gandhi (1869–1948) pre-eminent leader of Indian nationalism during British-ruled India

Part I, Chapter 17, Experiments in Dietetics
1920s, An Autobiography (1927)

“Nothing is more common than energy in money-making, quite independent of any higher object than its accumulation. A man who devotes himself to this pursuit, body and soul, can scarcely fail to become rich. Very little brains will do; spend less than you earn; add guinea to guinea; scrape and save; and the pile of gold will gradually rise.”

Samuel Smiles (1812–1904) Scottish author

Source: Self-Help; with Illustrations of Character and Conduct (1859), Ch. X : Money — Its Use and Abuse

“We want the mathematical genius - there is work for him. We want the literary genius - there is work for him, especially in my office. We want the scientific brain - there is more than enough work for him. We want the man of brains and we want the man of common sense and little brain. We want the man of initiative and the man of action, the methodical man and even the crank. We open our ranks widely to all.”

Hugh Trenchard, 1st Viscount Trenchard (1873–1956) Royal Flying Corps commander and first Royal Air Force Chief of the Air Staff

Speech to the Cambridge University Aeronautical Society, April 1925 in Trenchard, Man of Vision (1962) p. 519

“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 <br class="br">The Descent of Man (1871)

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Thomas Henry Huxley127

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