Quotes from book
Hen's Teeth and Horse's Toes

Hen's Teeth and Horse's Toes
Stephen Jay Gould

Hen's Teeth and Horse's Toes is Stephen Jay Gould's third volume of collected essays reprinted from his monthly columns for Natural History magazine titled "This view of life". Three essays appeared elsewhere. "Evolution as Fact and Theory" first appeared in Discover magazine in May 1981; "Phyletic size decrease in Hershey bars" appeared in C. J. Rubins's Junk Food, 1980; and his "Reply to critics", was written specifically for this volume as a commentary upon criticism of essay 16, "The Piltdown Conspiracy".

“Zoocentrism is the primary fallacy of human sociobiology, for this view of human behavior rests on the argument that if the actions of "lower" animals with simple nervous systems arise as genetic products of natural selection, then human behavior should have a similar basis.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Our Natural Place", p. 243
Hen's Teeth and Horse's Toes (1983)

“We do not inhabit a perfected world where natural selection ruthlessly scrutinizes all organic structures and then molds them for optimal utility. Organisms inherit a body form and a style of embryonic development; these impose constraints upon future change and adaptation. In many cases, evolutionary pathways reflect inherited patterns more than current environmental demands. These inheritances constrain, but they also provide opportunity. A potentially minor genetic change […] entails a host of complex, nonadaptive consequences. […] What “play” would evolution have if each structure were built for a restricted purpose and could be used for nothing else? How could humans learn to write if our brain had not evolved for hunting, social cohesion, or whatever, and could not transcend the adaptive boundaries of its original purpose?”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Hyena Myths and Realities", p. 156
Hen's Teeth and Horse's Toes (1983)

“Sociobiology is not just any statement that biology, genetics, and evolutionary theory have something to do with human behavior. Sociobiology is a specific theory about the nature of genetic and evolutionary input into human behavior. It rests upon the view that natural selection is a virtually omnipotent architect, constructing organisms part by part as best solutions to problems of life in local environments. It fragments organisms into “traits,” explains their existence as a set of best solutions, and argues that each trait is a product of natural selection operating “for” the form or behavior in question. Applied to humans, it must view specific behaviors (not just general potentials) as adaptations built by natural selection and rooted in genetic determinants, for natural selection is a theory of genetic change. Thus, we are presented with unproved and unprovable speculations about the adaptive and genetic basis of specific human behaviors: why some (or all) people are aggressive, xenophobic, religious, acquisitive, or homosexual.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Our Natural Place", p. 243
Hen's Teeth and Horse's Toes (1983)

“The enemy is not fundamentalism; it is intolerance. In this case, the intolerance is perverse since it masquerades under the “liberal” rhetoric of “equal time.””

Stephen Jay Gould book Hen's Teeth and Horse's Toes

But mistake it not.
"A Visit to Dayton", p. 276
Hen's Teeth and Horse's Toes (1983)

“Organisms […] are directed and limited by their past. They must remain imperfect in their form and function, and to that extent unpredictable since they are not optimal machines. We cannot know their future with certainty, if only because a myriad of quirky functional shifts lie within the capacity of any feature, however well adapted to a present role.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Quick Lives and Quirky Changes", p. 65
Hen's Teeth and Horse's Toes (1983)

“Since we proposed punctuated equilibria to explain trends, it is infuriating to be quoted again and again by creationists—whether through design or stupidity, I do not know—as admitting that the fossil record includes no transitional forms. Transitional forms are generally lacking at the species level, but they are abundant between larger groups.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Evolution as Fact and Theory", p. 260
Hen's Teeth and Horse's Toes (1983)

“A complete theory of evolution must acknowledge a balance between “external” forces of environment imposing selection for local adaptation and “internal” forces representing constraints of inheritance and development. Vavilov placed too much emphasis on internal constraints and downgraded the power of selection. But Western Darwinians have erred equally in practically ignoring (while acknowledging in theory) the limits placed on selection by structure and development—what Vavilov and the older biologists would have called “laws of form.””

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"A Hearing for Vavilov", p. 144
Hen's Teeth and Horse's Toes (1983)

“Our failure to discern a universal good does not record any lack of insight or ingenuity, but merely demonstrates that nature contains no moral messages framed in human terms. Morality is a subject for philosophers, theologians, students of the humanities, indeed for all thinking people. The answers will not be read passively from nature; they do not, and cannot, arise from the data of science. The factual state of the world does not teach us how we, with our powers for good and evil, should alter or preserve it in the most ethical manner.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Nonmoral Nature", pp. 42–43
Hen's Teeth and Horse's Toes (1983)

“We live in an essential and unresolvable tension between our unity with nature and our dangerous uniqueness. Systems that attempt to place and make sense of us by focusing exclusively either on the uniqueness or the unity are doomed to failure. But we must not stop asking and questing because the answers are complex and ambiguous.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Our Natural Place", p. 250
Hen's Teeth and Horse's Toes (1983)

“All versions written for nonscientists speak of fused males as the curious tale of the anglerfish—just as we so often hear about the monkey swinging through the trees, or the worm burrowing through soil. But if nature teaches us any lesson, it loudly proclaims life's diversity. There ain't no such abstraction as the clam, the fly, or the anglerfish. Ceratioid anglerfishes come in nearly 100 species, and each has its own peculiarity.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Big Fish, Little Fish", p. 29
Hen's Teeth and Horse's Toes (1983)

“Thus, we have three principles for increasing adequacy of data: if you must work with a single object, look for imperfections that record historical descent; if several objects are available, try to render them as stages of a single historical process; if processes can be directly observed, sum up their effects through time. One may discuss these principles directly or recognize the “little problems” that Darwin used to exemplify them: orchids, coral reefs, and worms—the middle book, the first, and the last.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Worm for a Century, and All Seasons", p. 132
Hen's Teeth and Horse's Toes (1983)

“Well, evolution is a theory. It is also a fact. And facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts do not go away while scientists debate rival theories for explaining them. Einstein's theory of gravitation replaced Newton's, but apples did not suspend themselves in mid-air pending the outcome. And human beings evolved from apelike ancestors whether they did so by Darwin's proposed mechanism or by some other, yet to be discovered. […] Evolutionists make no claim for perpetual truth, though creationists often do (and then attack us for a style of argument that they themselves favor). In science, “fact” can only mean “confirmed to such a degree that it would be perverse to withhold provisional assent.””

Stephen Jay Gould book Hen's Teeth and Horse's Toes

I suppose that apples might start to rise tomorrow, but the possibility does not merit equal time in physics classrooms.
"Evolution as Fact and Theory", pp. 254–55 (originally appeared in Discover Magazine, May 1981)
Hen's Teeth and Horse's Toes (1983)

“Perhaps randomness is not merely an adequate description for complex causes that we cannot specify. Perhaps the world really works this way, and many events are uncaused in any conventional sense of the word. Perhaps our gut feeling that it cannot be so reflects only our hopes and prejudices, our desperate striving to make sense of a complex and confusing world, and not the ways of nature.”

Stephen Jay Gould book Hen's Teeth and Horse's Toes

"Chance Riches", p. 342
Hen's Teeth and Horse's Toes (1983)

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