“The theory of punctuated equilibrium, proposed by Niles Eldredge and myself, is not, as so often misunderstood, a radical claim for truly sudden change, but a recognition that ordinary processes of speciation, properly conceived as glacially slow by the standard of our own life-span, do not resolve into geological time as long sequences of insensibly graded intermediates (the traditional, or gradualistic, view), but as geologically “sudden” origins at single bedding planes.”

— Stephen Jay Gould, book Time's Arrow, Time's Cycle

Source: Time's Arrow, Time's Cycle (1987), pp. 2–3

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Stephen Jay Gould274

American evolutionary biologist 1941–2002

Stephen Jay Gould book The Structure of Evolutionary Theory

Source: The Structure of Evolutionary Theory (2002), p. 778

“Finally, the claim that we equated punctuated equilibrium with saltation makes no sense within the logical structure of our theory — so, unless we are fools, how could we ever have asserted such a proposition? Our theory holds, as a defining statement, that ordinary allopatric speciation, unfolding gradually at microevolutionary scales, translates to punctuation in geological time.”

Stephen Jay Gould book The Structure of Evolutionary Theory

Source: The Structure of Evolutionary Theory (2002), p. 1009

“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.”

Charles Darwin book On the Origin of Species (1859)

Source: 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

“In my account of his [Lamarck's] theory, I did not, at the time, fully appreciate the deep conviction which it displays of the slow manner in which geological changes have taken place, and the insignificance of thirty or forty centuries in the history of a species, and that, too, at a period when very narrow views were entertained of the extent of past time by most of the ablest geologists, and when great revolutions of the earth's crust, and its inhabitants, were generally attributed to sudden and violent catastrophes.”

Charles Lyell (1797–1875) British lawyer and geologist

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.20, p. 392-393

“Ordinary speciation remains fully adequate to explain the causes and phenomenology of punctuation.”

Stephen Jay Gould book The Structure of Evolutionary Theory

Source: The Structure of Evolutionary Theory (2002), p. 1001

“…its ultimate origin is still lost in geological antiquity.”

Bal Gangadhar Tilak (1856–1920) Indian independence activist

“The Arctic Home in the Vedas” on dating of the Vedas to 3000 to 1400 BC [Ganga Prasad, The Fountainhead of Religion: A Comparative Study of the Principle Religions of the World and a Manifestation of Their Common Origin from the Vedas, http://books.google.com/books?id=0QO_zed25R4C&pg=PA222, 1 January 2000, Book Tree, 978-1-58509-054-9, 222–]

“It gives liberty and breadth to thought, to learn to judge our own epoch from the point of view of universal history, history from the point of view of geological periods, geology from the point of view of astronomy.”

Henri-Frédéric Amiel (1821–1881) Swiss philosopher and poet

20 July 1848
Journal Intime (1882), Journal entries

“Our brains are […] not equipped to process events on the geologic scale—at least in reference to how we choose to live, or what we choose to do in the here-and-now.”

James Howard Kunstler book The Long Emergency

Source: The Long Emergency (2005), Chapter 5, p. 148.

“Civilization exists by geological consent, subject to change without notice.”

Will Durant (1885–1981) American historian, philosopher and writer

"What is Civilization?" Ladies' Home Journal, LXIII (January, 1946).

“I published that theory [of speciational evolution] in a 1954 paper…and I clearly related it to paleontology. Darwin argued that the fossil record is very incomplete because some species fossilize better than others… I noted that you are never going to find evidence of a small local populatlon that changed very rapidly in the fossil record… Gould was my course assistant at Harvard where I presented this theory again and again for three years. So he knew it thoroughly. So did Eldredge. In fact, in his 1971 paper Eldredge credited me with it. But that was lost over time.”

Ernst Mayr (1904–2005) German-American Evolutionary Biologist

Ernst Mayr (2000) " The Grand old Man of Evolution" interview by Michael Shermer and Frank Sulloway http://www.stephenjaygould.org/library/mayr_interview.html, Skeptic 8 (1): 79; As cited in: Quotations Ernst Mayr on Gould http://www.stephenjaygould.org/people/mayr_quotations.html, Stephen Jay Gould Archive, 2013

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