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Greg Priest

@gregpriest

PhD in history and philosophy of science (also JD and MLA), Stanford. Biology, complexity, diagramming. Philosophy of history. Curates these BlueSky feeds: History and Philosophy of Biology Complexity Science Philosophy of History and Historiography

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Latest posts by Greg Priest @gregpriest

You’ll note that I credited Cameron in the alt text.

08.03.2026 04:50 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Photographic portrait of H by Julia Margaret Cameron. Wikipedia.

Photographic portrait of H by Julia Margaret Cameron. Wikipedia.

John Herschel was born OTD in 1792.

His 1831 Preliminary Discourse launched a flowering of reflection on the aims and methods of science among British thinkers that was so rich and influential that Charles Sanders Peirce would later dub it β€œthe Age of Method.”

πŸ§ͺ#HistSTM #PhilSci πŸ‹πŸŒ±

07.03.2026 16:00 πŸ‘ 33 πŸ” 7 πŸ’¬ 3 πŸ“Œ 7

Thanks! I focused on James, but as you say, could just as easily have talked about Dewey.

25.02.2026 20:00 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Here’s a link to the full article (paywall):

https://muse.jhu.edu/article/676147/pdf

#HistSTM πŸŒ±πŸ‹ #evobio #philsci πŸ¦«πŸ¦‹

24.02.2026 16:27 πŸ‘ 10 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
Preview
What if Humans Were Raised Like Bees? Charles Darwin and the Evolution of Morality By Greg Priest Read the full companion article in this quarter’s Journal of the History of Ideas. A new biography of Charles Darwin is coming out. Styled as a β€œradical reappraisal,” the book, by...

Darwin’s Descent of Man launched OTD in 1871. In it, D finally made explicit what had been obvious, if unstated, in the Origin: humans had evolved.

And not merely bodily. Our minds, even our moral codes, evolved from animal sources.

#HistSTM πŸŒ±πŸ‹ #evobio #philsci πŸ¦«πŸ¦‹

24.02.2026 16:27 πŸ‘ 14 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1

β€œ[T]he very phenomenon being investigated may be changed by the inquiry itself. It is as if there were a principle of human indeterminacy at work.”

β€œEach of us becomes a new person as we redescribe the past.”

#PhilSci #HistSTM πŸ‹πŸŒ±πŸ¦‹πŸ¦«πŸ§ͺπŸ—ƒοΈπŸ§ 

18.02.2026 16:29 πŸ‘ 15 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
Caricature of Hacking by David Levine for @nybooks.com.

Caricature of Hacking by David Levine for @nybooks.com.

Ian Hacking was born OTD in 1936.

β€œThere is no canonical way to think of our own past. In the endless quest for order and structure, we grasp at whatever picture is floating by and put our past into its frame.”

#PhilSci #HistSTM πŸ‹πŸŒ±πŸ¦‹πŸ¦«πŸ§ͺπŸ—ƒοΈπŸ§ 

18.02.2026 16:29 πŸ‘ 14 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1
Caricature of Hacking by David Levine for @nybooks.com.

Caricature of Hacking by David Levine for @nybooks.com.

Ian Hacking was born OTD in 1936.

β€œThere is no canonical way to think of our own past. In the endless quest for order and structure, we grasp at whatever picture is floating by and put our past into its frame.”

#PhilSci #HistSTM πŸ‹πŸŒ±πŸ¦‹πŸ¦«πŸ§ͺπŸ—ƒοΈπŸ§ 

18.02.2026 16:29 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

β€œHuman creativity stems from the ability to combine and recombine existing ideas in novel ways.”

#Complexity #HistSTM #PhilSci πŸ§ͺ

15.02.2026 16:16 πŸ‘ 28 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1
Caricature of H by Dan Williams for The Economist.

Caricature of H by Dan Williams for The Economist.

Douglas Hofstadter was born OTD in 1945.

β€œIt turns out that an eerie type of chaos can lurk just behind a facade of orderβ€”and yet, deep inside the chaos lurks an even eerier type of order.”

#Complexity #HistSTM #PhilSci πŸ§ͺ

15.02.2026 16:15 πŸ‘ 9 πŸ” 1 πŸ’¬ 1 πŸ“Œ 1

I take him to be suggesting that a search for invariance is in a sense a search for essence, and that undertaking such a search implies a belief that the essence thus discovered is in some sense more fundamental than the β€œaccidental” sources of variation. Sounds a bit Platonic to me.

10.02.2026 16:43 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Plate of iguanodon teeth from Gideon Mantell, β€œNotice on the Iguanodon, a newly discovered fossil reptile, from the sandstone of Tilgate Forest, in Sussex,”Philosophical Transactions of the Royal Society of London, vol. 115 (1825), p. 186.

Plate of iguanodon teeth from Gideon Mantell, β€œNotice on the Iguanodon, a newly discovered fossil reptile, from the sandstone of Tilgate Forest, in Sussex,”Philosophical Transactions of the Royal Society of London, vol. 115 (1825), p. 186.

Gideon Mantell published his description of the iguanodon OTD in 1825.

He had originally thought that the fossil teeth on which he based his description were those of a giant crocodile, but later determined that the creature was an enormous herbivore.

πŸ‹πŸŒ±πŸ—ƒοΈβ€οΈπŸ§ͺ #HistSTM

10.02.2026 16:36 πŸ‘ 12 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0
Photo of Monod. Maker unknown. From Wikipedia.

Photo of Monod. Maker unknown. From Wikipedia.

Jacques Monod was born OTD in 1910.

β€œIn science there is and will remain a Platonic element which could not be taken away without ruining it. Among the infinite diversity of singular phenomena science can only look for invariants.”

πŸ‹πŸŒ± πŸ¦«πŸ¦‹ #Philsci #HistSTM #evobio

09.02.2026 16:13 πŸ‘ 18 πŸ” 4 πŸ’¬ 1 πŸ“Œ 0
Final stanza of the poem:

 If you catch him,
hold up a flashlight to his eye. It’s all dark pupil,
an entire night itself, whose haired horizon tightens
as he stares back, and closes up the eye. Then from the lids
one tear, his only possession, like the bee’s sting, slips.
Slyly he palms it, and if you’re not paying attention
he’ll swallow it. However, if you watch, he’ll hand it over,
cool as from underground springs and pure enough to drink.

Final stanza of the poem: If you catch him, hold up a flashlight to his eye. It’s all dark pupil, an entire night itself, whose haired horizon tightens as he stares back, and closes up the eye. Then from the lids one tear, his only possession, like the bee’s sting, slips. Slyly he palms it, and if you’re not paying attention he’ll swallow it. However, if you watch, he’ll hand it over, cool as from underground springs and pure enough to drink.

Elizabeth Bishop was born OTD in 1911.

She wrote the best poem ever inspired by a typo in a newspaper articleβ€”β€œman-moth,” when what was intended was β€œmammoth.”

#booksky #poetry

www.poetryfoundation.org/poems/47537/...

08.02.2026 14:13 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Preview
Dogs with a large vocabulary of object labels learn new labels by overhearing like 1.5-year-old infants Children as young as 18 months can acquire novel words by overhearing third-party interactions. Demonstrating similar learning processes in nonhuman species would indicate that the social-cognitive sk...

New study finds that some dogs are able to learn new words from overhearing conversations not directed at them, with a facility comparable to that of 18-month old human infants.

πŸ§ͺπŸ‹πŸŒ±

19.01.2026 17:53 πŸ‘ 34 πŸ” 11 πŸ’¬ 4 πŸ“Œ 2

β€œReality, in its quantitative aspect, must be considered as a system of populations.… The general study of the equilibria and dynamics of populations … has probably reached its highest development in the biological study known as 'ecology,' [and] this name may well be given to it.”

πŸŒ±πŸ‹ #philsci πŸ§ͺπŸŒŽπŸ¦‹πŸ¦«

18.01.2026 17:52 πŸ‘ 29 πŸ” 10 πŸ’¬ 0 πŸ“Œ 0
View of Earth as photographed by the Apollo 8 astronauts during their lunar orbit mission. NASA, via Wikimedia Commons.

View of Earth as photographed by the Apollo 8 astronauts during their lunar orbit mission. NASA, via Wikimedia Commons.

Kenneth Bouldingβ€”philosopher, #complexity theorist, and mysticβ€”was born OTD in 1910.

β€œThe earth has become a single spaceship, without unlimited reservoirs of anything … and in which, therefore, man must find his place in a cyclical ecological system.”

πŸŒ±πŸ‹ #philsky #philsci πŸ§ͺ🌎 #STS

18.01.2026 17:51 πŸ‘ 26 πŸ” 6 πŸ’¬ 0 πŸ“Œ 2

β€œDon't underestimate the value of doing nothing, of just going along, listening to all the things you can't hear, and not bothering.”

#philsky #booksky

18.01.2026 17:49 πŸ‘ 11 πŸ” 2 πŸ’¬ 0 πŸ“Œ 0
Ernest Shepard, Pen and ink on board, "Pooh and Piglet walked home thoughtfully together in the golden evening, and for a long time they were silent," original signed artwork from A.A. Milne's Winnie-the-Pooh. Bonham’s. 

β€œDon't underestimate the value of doing nothing, of just going along, listening to all the things you can't hear, and not bothering.” 

#philsky #booksky

Ernest Shepard, Pen and ink on board, "Pooh and Piglet walked home thoughtfully together in the golden evening, and for a long time they were silent," original signed artwork from A.A. Milne's Winnie-the-Pooh. Bonham’s. β€œDon't underestimate the value of doing nothing, of just going along, listening to all the things you can't hear, and not bothering.” #philsky #booksky

AA Milne was born on this day in 1882.

β€œSome people talk to animals. Not many listen though. That's the problem.”

πŸŒ±πŸ‹πŸ§ͺ#PhilSci #booksky

18.01.2026 17:48 πŸ‘ 114 πŸ” 31 πŸ’¬ 1 πŸ“Œ 1
Photo of Weinberg. Photographer unknown.

Photo of Weinberg. Photographer unknown.

OTD 1908 Willhelm Weinberg gave a talk to the Society for the Natural History of the Fatherland in WΓΌrttemberg giving the population genetics equations GH Hardy would independently publish 5 months later. It was 35 years before his work was recognized in the Anglophone world.

πŸ‹πŸŒ±πŸ₯’πŸ§ͺ #EvoBio #HistSTM

13.01.2026 17:27 πŸ‘ 10 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
Photo of Feyerabend, www.pkfeyerabend.org.

Photo of Feyerabend, www.pkfeyerabend.org.

Paul Feyerabend was born OTD in 1924.

Knowledge is not a body of consistent theories converging on truth. It is β€œan ever increasing ocean of mutually incompatible … alternatives, each single theory, each fairy tale, each myth … forcing the others into greater articulation.”

πŸ§ͺπŸ¦‹πŸ¦« #PhilSci #STS

13.01.2026 17:25 πŸ‘ 45 πŸ” 8 πŸ’¬ 2 πŸ“Œ 2

Mine too. He kind of still is. Dreamy!

13.01.2026 05:00 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
1865 photo of James taken on an expedition to the Amazon under Louis Agassiz.

MS Am 1092 (1185), Houghton Library, Harvard University.

1865 photo of James taken on an expedition to the Amazon under Louis Agassiz. MS Am 1092 (1185), Houghton Library, Harvard University.

William James was born OTD in 1842.

As important as β€œpragmatism” to understanding James is β€œmeliorism,” the idea that improving the world is possible, but not assured. We have to fight for it.

β€œWe receive in short the block of marble, but we carve the statue ourselves.”

#philsky

11.01.2026 16:28 πŸ‘ 41 πŸ” 10 πŸ’¬ 5 πŸ“Œ 2

An ecologist β€œlives alone in a world of wounds…. [He] must either harden his shell and make believe that the consequences of science are none of his business, or he must be the doctor who sees the marks of death in a community that believes itself well and does not want to be told otherwise.”

πŸŒ±πŸ‹πŸŒŽπŸ§ͺ

11.01.2026 16:06 πŸ‘ 74 πŸ” 28 πŸ’¬ 2 πŸ“Œ 1
Photo of Leopold in horseback. The Wilderness Society.

Photo of Leopold in horseback. The Wilderness Society.

Aldo Leopold was born OTD in 1887.

β€œWe abuse land because we see it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect.”

#HpBio #HistSTM 🌎 #philsci #STS πŸ§ͺ

11.01.2026 16:06 πŸ‘ 81 πŸ” 28 πŸ’¬ 3 πŸ“Œ 6
Caricature of Wallace, including the words β€œAfter you, Mr. Darwin, kind sir.” By David Hughes for the New Yorker.

Caricature of Wallace, including the words β€œAfter you, Mr. Darwin, kind sir.” By David Hughes for the New Yorker.

Alfred Russel Wallace born OTD in 1823.

He said he shared with Darwin β€œan intense interest in … the variety [of living things] that catches the eye of the observer even among those which are very much alike, but which are soon found to differ in several distinct characters.”

πŸŒ±πŸ‹πŸ§ͺ #HistSTM #EvoBio

08.01.2026 16:03 πŸ‘ 45 πŸ” 16 πŸ’¬ 0 πŸ“Œ 1
Wegener's (1915) depiction of the breakup of Pangaea. (a) the Carboniferous, (b) the Eocene, (c) today.

Wegener's (1915) depiction of the breakup of Pangaea. (a) the Carboniferous, (b) the Eocene, (c) today.

OTD in 1912, Alfred Wegener delivered a lecture propounding the theory that our modern continents were formed by the splitting and drifting apart of an ancient supercontinent, which he named Pangea.

Due to his failure to offer a plausible mechanism, he was widely ridiculed.

πŸ§ πŸ—ƒοΈβš’οΈ πŸ§ͺ #HistSTM #PhilSci

06.01.2026 16:55 πŸ‘ 90 πŸ” 28 πŸ’¬ 6 πŸ“Œ 2
Arthur Danto, Spinoza as a Young Man 2011. Woodcut. Credit: Wayne State University Art Collection.

Arthur Danto, Spinoza as a Young Man 2011. Woodcut. Credit: Wayne State University Art Collection.

Arthur Danto was born Jan 2, 1924

To call a car β€œdented” is to implicitly refer to an earlier undented state.

Stories β€œhave a beginning, a middle, and an end. An [historical] explanation then consists in filling in the middle between the temporal end-points of a change.”

πŸ§ πŸ—ƒοΈ πŸ¦‹πŸ¦« #PhilSsci #PhilSky

04.01.2026 00:15 πŸ‘ 9 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Thanks for the feed boost!

28.12.2025 20:34 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Photo of Fred Korematsu, and a copy of FDR’s internment order.

Photo of Fred Korematsu, and a copy of FDR’s internment order.

OTD in 1944, in Korematsu v. US, SCOTUS upheld the constitutionality of FDR’s order that US citizens of Japanese descent be involuntarily interned.

The decision has come to be seen as one of the lowest moments in the Supreme Court’s history.

18.12.2025 18:36 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1