“We have always thought that Mr. Darwin has unnecessarily hampered himself by adhering so strictly to his favourite "Natura non facit saltum." We greatly suspect that she does make considerable jumps in the way of variation now and then, and that these saltations give rise to some of the gaps which appear to exist in the series of known forms.”

1860s, Criticisms on "The Origin of the Species" (1864)

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Thomas Henry Huxley127

English biologist and comparative anatomist 1825–1895

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“Evolution must have involved the simultaneous change in many genes, which doubtless accounts for its slowness. Here matters would have been easier if heritable variations really formed a continuum, as Darwin apparently thought, i. e. if there were no limit to the possible smallness of a variation. But this is clearly not the case when we are considering meristic characters. …the atomic nature of Mendelian inheritance suggests very strongly that even where variation is apparently continuous this appearance is deceptive.”

J. B. S. Haldane book The Causes of Evolution

Source: The Causes of Evolution (1932), Ch. IV Natural Selection, pp. 103-104.

“Of Dr. Hooker, whom I have often cited in this chapter, Mr. Darwin has spoken in the Introduction to his 'Origin of Species, as one 'who had, for fifteen years, aided him in every possible way, by his large stores of knowledge, and his excellent judgement.' This distinguished botanist published his 'Introductory Essay to the Flora of Australia' in 1859, the year after the memoir on 'Natural Selection' was communicated to the Linnaean Society, and a few months before the appearance of the' Origin of Species.'… no one was better qualified by observation and reflection to give an authoritative opinion on the question, whether the present vegetation of the globe is or is not in accordance with the theory which Mr. Darwin has proposed. We cannot but feel, therefore, deeply interested when we find him making the following declaration: 'The mutual relations of the plants of each great botanical province, and, in fact, of the world generally, is just such as would have resulted if variation had gone on operating throughout indefinite periods, in the same manner as we see it act in a limited number of centuries, so as gradually to give rise in the course of time, to the most widely divergent forms…. The element of mutability pervades the whole Vegetable Kingdom; no class, nor order, nor genus of more than a few species claims absolute exemption from it, whilst the grand total of unstable forms, generally assumed to be species, probably exceeds that of the stable.”

Charles Lyell (1797–1875) British lawyer and geologist

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 417-418

“In Darwin's theory, you just have to substitute 'mutations' for his 'slight accidental variations' (just as quantum theory substitutes 'quantum jump' for 'continuous transfer of energy'). In all other respects little change was necessary in Darwin's theory…”

Erwin Schrödinger book What Is Life?

What Is Life? (1944)

“Natural selection, the blind, unconscious, automatic process which Darwin discovered, and which we now know is the explanation for the existence and apparently purposeful form of all life, has no purpose in mind. It has no mind and no mind’s eye. It does not plan for the future. It has no vision, no foresight, no sight at all. If it can be said to play the role of watchmaker in nature, it is the blind watchmaker.”

Richard Dawkins book The Blind Watchmaker

Source: The Blind Watchmaker (1986), Chapter 1 “Explaining the Very Improbable” (p. 5)

“We perceive nature through the senses, which give us images of forms of colour, sounds etc. A form which exists only in relation to another form on its own, it does not exist.”

Édouard Vuillard (1868–1940) French painter

11 Nov 1888.
Private Journal - A collage of notes and images, sketches kept 1888-1895 & 1907 to 1940

“It cannot be doubted, I think, that Mr. Darwin has satisfactorily proved that what he terms selection, or selective modification, must occur, and does occur, in nature; and he has also proved to superfluity that such selection is competent to produce forms as distinct, structurally, as some genera even are. If the animated world presented us with none but structural differences, I should have no hesitation in saying that Mr. Darwin has demonstrated the existence of a true physical cause, amply competent to account for the origin of living species, and of man among the rest.”

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

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 126

“As systematic inquiry into the natural facts was begun it was at once found that the accepted ideas of variation were unfounded. Variation was seen very frequently to be a definite and specific phenomenon, affecting different forms of life in different ways, but in all its diversity showing manifold and often obvious indications of regularity. This observation was not in its essence novel. Several examples of definite variation had been well known to Darwin and others, but many, especially Darwin himself in his later years, had nevertheless been disposed to depreciate the significance of such facts. They consequently then lapsed into general disparagement. Upon more careful inquiry the abundance of such phenomena proved to be far greater than was currently supposed, and a discussion of their nature brought into prominence a consideration of greater weight, namely that the differences by which these definite or discontinuous variations are constituted again and again approximate to and are comparable with the class of differences by which species are distinguished from each other.”

William Bateson (1861–1926) British geneticist and biologist

Preface
Problems In Genetics (1913)

“There is but one hypothesis regarding the origin of species of animals in general which has any scientific existence—that propounded by Mr. Darwin.”

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

Source: 1860s, Evidence as to Man's Place in Nature (1863), Ch.2, p. 125

“If we follow the traditional way of thought, there will always be traditional enemies. Extremist circles from both sides will find causes to give rise to problems.”

Fatos Nano (1952) Albanian politician

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