The immediate reactions, from November 1859 to April 1861, to On the Origin of Species, the book in which Charles Darwin described evolution by natural selection, included international debate, though the heat of controversy was less than that over earlier works such as Vestiges of Creation. Darwin monitored the debate closely, cheering on Thomas Henry Huxley's battles with Richard Owen to remove clerical domination of the scientific establishment. While Darwin's illness kept him away from the public debates, he read eagerly about them and mustered support through correspondence.

Religious views were mixed, with the Church of England's scientific establishment reacting against the book, while liberal Anglicans strongly supported Darwin's natural selection as an instrument of God's design. Religious controversy was soon diverted by the publication of Essays and Reviews and debate over the higher criticism.

The most famous confrontation took place at the public 1860 Oxford evolution debate during a meeting of the British Association for the Advancement of Science, when the Bishop of Oxford Samuel Wilberforce argued against Darwin's explanation. In the ensuing debate Joseph Hooker argued strongly in favor of Darwinian evolution. Thomas Huxley's support of evolution was so intense that the media and public nicknamed him "Darwin's bulldog". Huxley became the fiercest defender of the evolutionary theory on the Victorian stage. Both sides came away feeling victorious, but Huxley went on to depict the debate as pivotal in a struggle between religion and science and used Darwinism to campaign against the authority of the clergy in education, as well as daringly advocating the "Ape Origin of Man".

Background

Darwin's ideas developed rapidly after returning from the Voyage of the Beagle in 1836. By December 1838, he had developed the basic principles of his theory. At that time, ideas about the transmutation of species were associated with radical political ideas of the Age of Enlightenment and the French Revolution, and some people, such as Darwin's old instructor Robert Edmond Grant had been ridiculed and marginalized by members of the scientific establishment such as Richard Owen for advocating them. Darwin was conscious of the need to answer all likely objections before publishing. While he continued with research, he had an immense amount of work in hand analyzing and publishing findings from the Beagle expedition, and was repeatedly delayed by illness.

The Natural history, especially in Britain, at that time was dominated by proponents of natural theology, who saw their science as revealing God's plan, and many of whom, like Darwin's professors Adam Sedgwick and John Stevens Henslow, were ordained clergy in the Church of England. Darwin found three close allies. The eminent geologist Charles Lyell, whose books had influenced the young Darwin during the Voyage of the Beagle, befriended Darwin who he saw as a supporter of his ideas of gradual geological processes with continuing divine creation of species. By the 1840s Darwin became friends with the young botanist Joseph Dalton Hooker who had followed his father into the science, and after going on a survey voyage used his contacts to eventually find a position. In the 1850s Darwin met Thomas Huxley, an ambitious naturalist who had returned from a long survey trip but lacked the family wealth or contacts to find a career and who joined the progressive group around Herbert Spencer looking to make science a profession, freed from the clerics.

This was also a time of intense conflict over religious morality in England, where evangelicalism led to increasing professionalism of clerics who had previously been expected to act as country gentlemen with wide interests, but now were seriously focussed on expanded religious duties. A new orthodoxy proclaimed the virtues of truth but also inculcated beliefs that the Bible should be read literally and that religious doubt was in itself sinful so should not be discussed. Science was also becoming professional and a series of discoveries cast doubt on literal interpretations of the Bible and the honesty of those denying the findings. A series of crises erupted with fierce debate and criticism over issues such as George Combe's The Constitution of Man and the anonymous Vestiges of the Natural History of Creation which converted vast popular audiences to the belief that natural laws controlled the development of nature and society. German higher criticism questioned the Bible as a historical document in contrast to the evangelical creed that every word was divinely inspired. Dissident clergymen even began questioning accepted premises of Christian morality, and Benjamin Jowett's 1855 commentary on St. Paul brought a storm of controversy.

By September 1854 Darwin's other books reached a stage where he was able to turn his attention fully to Species, and from this point he was working to publish his theory. On 18 June 1858 he received a parcel from Alfred Russel Wallace enclosing about twenty pages describing an evolutionary mechanism that was similar to Darwin's own theory. Darwin put matters in the hands of his friends Lyell and Hooker, who agreed on a joint presentation to the Linnean Society on 1 July 1858. Their papers were entitled, collectively, On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection.

Publication of The Origin of Species

Darwin now worked on an "abstract" trimmed from his Natural Selection manuscript. The publisher John Murray agreed the title as On the Origin of Species through Natural Selection and the book went on sale to the trade on 22 November 1859. The stock of 1,250 copies was oversubscribed, and Darwin, still at Ilkley spa town, began corrections for a second edition. The novelist Charles Kingsley, a Christian socialist country rector, sent him a letter of praise: "It awes me...if you be right I must give up much that I have believed", it was "just as noble a conception of Deity, to believe that He created primal forms capable of self development... as to believe that He required a fresh act of intervention to supply the lacunas which he himself had made." Darwin added these lines to the last chapter, with attribution to "a celebrated author and divine".

First reviews The reviewers were less encouraging. Four days before publication, a review in the authoritative Athenaeum (by John Leifchild, published anonymously, as was the custom at that time) was quick to pick out the unstated implications of "men from monkeys" already controversial from Vestiges, saw snubs to theologians, summing up Darwin's "creed" as man "was born yesterday – he will perish tomorrow" and concluded that "The work deserves attention, and will, we have no doubt, meet with it. Scientific naturalists will take up the author upon his own peculiar ground; and there will we imagine be a severe struggle for at least theoretical existence. Theologians will say—and they have a right to be heard—Why construct another elaborate theory to exclude Deity from renewed acts of creation? Why not at once admit that new species were introduced by the Creative energy of the Omnipotent? Why not accept direct interference, rather than evolutions of law, and needlessly indirect or remote action? Having introduced the author and his work, we must leave them to the mercies of the Divinity Hall, the College, the Lecture Room, and the Museum." At Ilkley, Darwin raged "But the manner in which he drags in immortality, & sets the Priests at me, & leaves me to their mercies, is base. He would on no account burn me; but he will get the wood ready and tell the black beasts how to catch me." Darwin sprained an ankle and his health worsened, as he wrote to friends it was "odious".

By 9 December when Darwin left Ilkley to come home, he had been told that Murray was organising a second run of 3,000 copies. Hooker had been "converted", Lyell was "absolutely gloating" and Huxley wrote "with such tremendous praise", advising that he was sharpening his "beak and claws" to disembowel "the curs who will bark and yelp".

First response Richard Owen had been the first to respond to the complimentary copies, courteously claiming that he had long believed that "existing influences" were responsible for the "ordained" birth of species. Darwin now had long talks with him, and told Lyell that "Under garb of great civility, he was inclined to be most bitter & sneering against me. Yet I infer from several expressions, that at bottom he goes immense way with us." Owen was furious at being included among those defending immutability of species, and in effect said that the book offered the best explanation "ever published of the manner of formation of species", though he did not agree with it in all respects. He still had the gravest doubts that transmutation would bestialise man. It appears that Darwin had assured Owen that he was looking at everything as resulting from designed laws, which Owen interpreted as showing a shared belief in "Creative Power".

Darwin had already made his views clearer to others, telling Lyell that if each step in evolution was providentially planned, the whole procedure would be a miracle and natural selection superfluous. He had also sent a copy to John Herschel, and on 10 December he told Lyell of having "heard by round about channel that Herschel says my Book "is the law of higgledy-piggledy".– What this exactly means I do not know, but it is evidently very contemptuous.– If true this is great blow & discouragement." Darwin subsequently corresponded with Herschel, and in January 1861 Herschel added a footnote to the draft of his Physical Geography which, while disparaging "the principle of arbitrary and casual variation and natural selection" as insufficient without "intelligent direction", said that "with some demur as to the genesis of man, we are far from disposed to repudiate the view taken of this mysterious subject in Mr. Darwin's book."

Geological time It was known that the geologic time scale was "incomprehensibly vast", if unquantifiable. From 1848 Darwin discussed data with Andrew Ramsay, who had said "it is vain to attempt to measure the duration of even small portions of geological epochs." A chapter of Lyell's Principles of Geology described the enormous amount of erosion involved in forming the Weald. To demonstrate the time available for natural selection to operate, Darwin drew on Lyell's example and Ramsay's data in chapter 9 of On the Origin of Species to estimate that erosion of the Weald's layered dome of Lower Cretaceous rocks "must have required 306,662,400 years; or say three hundred million years."

The "necessary corrections" Darwin made to his drafts for the second edition of the Origin were based on comments from others, particularly Lyell, and added a caveat suggesting a faster rate of erosion of the Weald: "perhaps it would be safer to allow two or three inches per century, and this would reduce the number of years to one hundred and fifty or one hundred million years." Copies of the second edition were advertised as ready on 24 December, in advance of official publication on 7 January 1860.

The Saturday Review of 24 December 1859 strongly criticised the methodology of Darwin's calculations.Anon (24 December 1859) [Review of] On the origin of species, Saturday Review, pp. 775–776. On 3 January 1860, Darwin wrote to Hooker about it: "Some of the remarks about the lapse of years are very good, & the Reviewer gives me some good & well deserved raps,—confound it I am sorry to confess the truth. But it does not at all concern main argument." A day later, he said to Lyell "You saw I suppose Saturday Review: argument confined to Geology, but has given me some perfectly just & severe raps on knuckles."