Stephen Jay Gould

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It flatters us to believe we’re the end result of an extraordinarily rare evolutionary event, but that doesn’t necessarily mean it isn’t so.

Stephen Jay Gould famously asked in 1989 if evolution would play out in the same way if we were able to “rewind the tape of life” to the Cambrian. He was sure it would not, that life was a cascading event that would have headed in a different direction, perhaps a very different one. Others vehemently disagree, thinking that variations would occur, sure, but given enough time, life would have wound up roughly in the same condition. 

In a Nautilus article, Zach Zurich takes up the question, believing the answer may lie in outer space. An excerpt:

Does the rarity of any particular sequence of events imply that major shifts in evolution are unlikely to be repeated? The experiments suggest that’s true, but Conway Morris firmly answers, no. “You’d be daft to say that there aren’t accidents of one sort or another. The question is one of time scales,” he says. Given enough years and enough mutating genomes, he believes that natural selection will drive life toward the inevitable adaptations that best fit the organisms’ ecological niche, no matter the contingencies that occur along the way. He believes that one day, all of the E. coli in Lenski’s experiment would evolve to consume citrate, and that all of Liu’s viruses would eventually scale their adaptive Mount Everests. Further, those experiments were conducted in very simple and controlled environments that don’t come close to matching the complex ecosystems that life must adapt to outside the lab. It’s hard to say how real-world environmental pressures might have altered the results.

So far, the biggest shortcoming in all of the attempts to answer the “tape of life” question is that biologists can only draw conclusions based on just one biosphere—the Earth’s. An encounter with extra-terrestrial life would undoubtedly tell us more. Even though alien organisms may not have DNA, they’d likely show similar patterns of evolution. They would need some material that would be passed down to their descendants, which would guide the development of organisms and change over time. As Lenski says, “What’s true for E. coli is also true for some microbe anywhere in the universe.”

Therefore, the same interactions between convergence and contingency might play out on other planets. And if extraterrestrial life faces similar evolutionary pressures to life on Earth, future humans may discover aliens that have convergently evolved an intelligence like ours.5 On the other hand, if contingent events build on one another, driving the development of life down unique paths as Gould suggested, extra-terrestrial life may be extraordinarily strange.

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From “Dorothy, It’s Really Oz,” the late paleontologist Stephen Jay Gould’s 1999 essay about that stubborn foolishness Creationism, which has since morphed into the idiocy known as Intelligent Design:

“In the early 1920s, several states simply forbade the teaching of evolution outright, opening an epoch that inspired the infamous 1925 Scopes trial (leading to the conviction of a Tennessee high school teacher) and that ended only in 1968, when the Supreme Court declared such laws unconstitutional on First Amendment grounds. In a second round in the late 1970s, Arkansas and Louisiana required that if evolution be taught, equal time must be given to Genesis literalism, masquerading as oxymoronic ‘creation science.’ The Supreme Court likewise rejected those laws in 1987.

The Kansas decision represents creationism’s first—and surely temporary—success with a third strategy for subverting a constitutional imperative: that by simply deleting, but not formally banning, evolution, and by not demanding instruction in a biblically literalist ‘alternative,’ their narrowly partisan religious motivations might not derail their goals.

Given this protracted struggle, Americans of goodwill might be excused for supposing that some genuine scientific or philosophical dispute motivates this issue: Is evolution speculative and ill founded? Does evolution threaten our ethical values or our sense of life’s meaning? As a paleontologist by training, and with abiding respect for religious traditions, I would raise three points to alleviate these worries:

First, no other Western nation has endured any similar movement, with any political clout, against evolution—a subject taught as fundamental, and without dispute, in all other countries that share our major sociocultural traditions.

Second, evolution is as well documented as any phenomenon in science, as strongly as the earth’s revolution around the sun rather than vice versa. In this sense, we can call evolution a ‘fact.’ (Science does not deal in certainty, so ‘fact’ can only mean a proposition affirmed to such a high degree that it would be perverse to withhold one’s provisional assent.)

The major argument advanced by the school board—that large-scale evolution must be dubious because the process has not been directly observed—smacks of absurdity and only reveals ignorance about the nature of science. Good science integrates observation with inference. No process that unfolds over such long stretches of time (mostly, in this case, before humans appeared), or at an infinitude beneath our powers of direct visualization (subatomic particles, for example), can be seen directly. If justification required eyewitness testimony, we would have no sciences of deep time—no geology, no ancient human history either. (Should I believe Julius Caesar ever existed? The hard bony evidence for human evolution, as described in the preceding pages, surely exceeds our reliable documentation of Caesar’s life.)

Third, no factual discovery of science (statements about how nature ‘is’) can, in principle, lead us to ethical conclusions (how we ‘ought’ to behave) or to convictions about intrinsic meaning (the ‘purpose’ of our lives). These last two questions—and what more important inquiries could we make?—lie firmly in the domains of religion, philosophy and humanistic study. Science and religion should be equal, mutually respecting partners, each the master of its own domain, and with each domain vital to human life in a different way.”

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Gould disccuses evolution in 2000 with that affable dinosaur Charlie Rose:

More Gould posts:

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No too many paleontologists make the pages of People magazine, but the late Stephen Jay Gould was a serious academic who crossed over into the mainstream. The Queens-born Harvard professor was a lightning rod for others who disagreed with his theories, but Gould was someone who continually questioned himself, often revising beliefs from early essays in subsequent ones. An excerpt from Michelle Green’s 1986 People profile:

“It is an inviting, vaguely antic enclave that suggests a 19th-century natural history museum turned into a bookish boys’ club. Faded lettering on the drab green walls announces ‘Synopsis of the Animal Kingdom’ and ‘Sponges and Protozoa,’ and in the room’s cluttered depths are a wealth of musty treasures: tall glass cases filled with drawers of trilobites, a towering painting of a tyrannosaurus, hundreds of leather-bound volumes and boxes of snail shells. A worn rattan chair has been pulled up to a worktable that holds fossils, microscopes and a supply of Pepperidge Farm cookies.

Stephen Jay Gould—evolutionary biologist, prolific writer and die-hard Yankees fan—has worked in this office at Harvard’s Museum of Comparative Zoology for 17 years, and many of his books have been spawned here: Ever Since Darwin, The Panda’s Thumb, Hen’s Teeth and Horse’s Toes and now The Flamingo’s Smile (Norton, $17.95). When he arrived with his freshly minted Ph.D. from Columbia, the rumpled, kinetic Gould was an exceptionally promising paleontologist; in the years since, he has become a popular symbol of erudition and scholarship. At 44, he recently completed the final year of a MacArthur Foundation grant that has paid him $38,400 a year since 1981. He was the recipient of an American Book Award in 1981, a National Magazine Award in 1980 and once made the cover of Newsweek. He has done battle with creationists, testified before congressional committees concerning nuclear winter and lectured in South Africa on the history of racism. Students fight to get into his classroom, and assorted crazies send tirades addressed to Mr. Illustrious Historical Professor Jay Gould, University of Harvard.

On this stone-gray afternoon, the illustrious historical professor is finding all the attention a bit of a problem. His secretary is putting through calls approximately every two minutes, and Gould—an ebullient man with a near-perpetual smile—is simultaneously trying to discuss his life’s work and fend off a flood of petitioners. On his desk is the latest batch of correspondence, including a letter from a man who suggests a connection between AIDS and aspirin, and a plea from the husband of a woman who is addicted to Gould’s columns in Discover:: Will the author please send birthday greetings to the following address? This nets the correspondent a hastily scrawled turndown: ‘I am not public property, but a man!'”

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The Queens-born paleontologist, who died in 2002, lived in Soho for many years. (Image by Kathy Chapman)

The American Scientist list of  “100 or so Books that shaped a Century of Science” includes the following 20th-century volumes about evolutionary science:

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“It’s All About the Fabulous Monkey Trials That Rocked America!” screamed the tag line for Inherit the Wind, the 1960 Stanley Kramer drama about the Scopes Monkey Trial of 1926. Like most people, I always assumed that Scopes was a simple battle between evolutionists and creationists. Clarence Darrow liked logic and William Jennings Bryan hated monkeys.

But according to Stephen Jay Gould’s essay, “William Jennings Bryan’s Last Campaign,” included in the late Queens-born paleontologist’s finest collection, Bully for Brontosaurus, it wasn’t quite that simple. While anyone who has even a shred of logic in their head accepts evolution, the textbook at the center of that trial was truly odious. Tennessee high-school teacher John Scopes taught from A Civic Biology by George William Hunter, which wasn’t exactly the enlightened tome. An excerpt from Gould’s essay, in which he quotes verbatim from Hunter’s disturbing writing about the poorer classes in the United States:

Hundreds of families, such as these described above exist today, spreading disease, immorality and crime to all parts of this country. The cost to society of such families is very severe. Just as certain animals or plants become parasitic on other plants and animals, these families become parasitic on society. They not only do harm to others by corrupting, stealing or spreading disease, but they are actually protected and cared for by the state out of public money. Largely for them the poorhouse and asylum exist. They take from society, but they give nothing in return. They are truly parasites.

If such people were lower animals, we would probably kill them off to prevent them from spreading. Humanity will not allow this, but we do have the remedy of separating the sexes in asylums or other places and in various ways preventing intermarriage and the possibilities of perpetuating such a low and degenerate race.•

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