Posts Tagged ‘paradigm’
“Over the long term, symbiosis is more useful than parasitism. More fun, too.”*…
There are many more varieties of minerals on earth than previously believed– and about half of them formed as parts or byproducts of living things…
The impact of Earth’s geology on life is easy to see, with organisms adapting to environments as different as deserts, mountains, forests, and oceans. The full impact of life on geology, however, can be easy to miss.
A comprehensive new survey of our planet’s minerals now corrects that omission. Among its findings is evidence that about half of all mineral diversity is the direct or indirect result of living things and their byproducts. It’s a discovery that could provide valuable insights to scientists piecing together Earth’s complex geological history—and also to those searching for evidence of life beyond this world.
In a pair of papers published on July 1, 2022 in American Mineralogist, researchers Robert Hazen, Shaunna Morrison and their collaborators outline a new taxonomic system for classifying minerals, one that places importance on precisely how minerals form, not just how they look. In so doing, their system acknowledges how Earth’s geological development and the evolution of life influence each other.
Their new taxonomy, based on an algorithmic analysis of thousands of scientific papers, recognizes more than 10,500 different types of minerals. That’s almost twice as many as the roughly 5,800 mineral “species” in the classic taxonomy of the International Mineralogical Association, which focuses strictly on a mineral’s crystalline structure and chemical makeup.
…
Morrison and Hazen also identified 57 processes that individually or in combination created all known minerals. These processes included various types of weathering, chemical precipitations, metamorphic transformation inside the mantle, lightning strikes, radiation, oxidation, massive impacts during Earth’s formation, and even condensations in interstellar space before the planet formed. They confirmed that the biggest single factor in mineral diversity on Earth is water, which through a variety of chemical and physical processes helps to generate more than 80 percent of minerals.
But they also found that life is a key player: One-third of all mineral kinds form exclusively as parts or byproducts of living things—such as bits of bones, teeth, coral, and kidney stones (which are all rich in mineral content) or feces, wood, microbial mats, and other organic materials that over geologic time can absorb elements from their surroundings and transform into something more like rock. Thousands of minerals are shaped by life’s activity in other ways, such as germanium compounds that form in industrial coal fires. Including substances created through interactions with byproducts of life, such as the oxygen produced in photosynthesis, life’s fingerprints are on about half of all minerals.
But they also found that life is a key player: One-third of all mineral kinds form exclusively as parts or byproducts of living things—such as bits of bones, teeth, coral, and kidney stones (which are all rich in mineral content) or feces, wood, microbial mats, and other organic materials that over geologic time can absorb elements from their surroundings and transform into something more like rock. Thousands of minerals are shaped by life’s activity in other ways, such as germanium compounds that form in industrial coal fires. Including substances created through interactions with byproducts of life, such as the oxygen produced in photosynthesis, life’s fingerprints are on about half of all minerals.
Historically, scientists “have artificially drawn a line between what is geochemistry and what is biochemistry,” said Nita Sahai, a biomineralization specialist at the University of Akron in Ohio who was not involved in the new research. In reality, the boundary between animal, vegetable, and mineral is much more fluid.
…
A new origins-based system for classifying minerals reveals the huge geochemical imprint that life has left on Earth. It could help us identify other worlds with life too: “Life Helps Make Almost Half of All Minerals on Earth,” from @jojofoshosho0 in @QuantaMagazine.
###
As we muse on minerals, we might send systemic birthday greetings to Thomas Samuel Kuhn; he was born on this date in 1922. A physicist, historian, and philosopher of science, Kuhn believed that scientific knowledge didn’t advance in a linear, continuous way, but via periodic “paradigm shifts.” Karl Popper had approached the same territory in his development of the principle of “falsification” (to paraphrase, a theory isn’t false until it’s proven true; it’s true until it’s proven false). But while Popper worked as a logician, Kuhn worked as a historian. His 1962 book The Structure of Scientific Revolutions made his case; and while he had– and has— his detractors, Kuhn’s work has been deeply influential in both academic and popular circles (indeed, the phrase “paradigm shift” has become an English-language staple).
“What man sees depends both upon what he looks at and also upon what his previous visual-conception experience has taught him to see.”
Thomas S. Kuhn, The Structure of Scientific Revolutions
“The idea that there might be limits to growth is for many people impossible to imagine”*…
At some level, we all know that nothing lasts forever…
In 1972, a team of MIT scientists got together to study the risks of civilizational collapse. Their system dynamics model published by the Club of Rome identified impending ‘limits to growth’ (LtG) that meant industrial civilization was on track to collapse sometime within the 21st century, due to overexploitation of planetary resources…
The report, authored by Donella Meadows and colleagues (working for Jay Forrester and the Club of Rome), was controversial from its release, with many pundits (often with sponsorship of mining, chemical, and petroleum companies)suggesting that the report’s logic’s flawed. But as scientists like Graham Turner of CSIRO observed in “A Comparison of the Limits to Growth with Thirty Years of Reality” just after after the turn of the century (summarized and updated here), the MIT team’s projections were alarmingly on track. A new study suggests that the LtG projections are holding still…
The analysis has now received stunning vindication from a study written by a senior director at professional services giant KPMG, one of the ‘Big Four’ accounting firms as measured by global revenue.The study was published in the Yale Journal of Industrial Ecology in November 2020 and is available on the KPMG website. It concludes that the current business-as-usual trajectory of global civilization is heading toward the terminal decline of economic growth within the coming decade—and at worst, could trigger societal collapse by around 2040.
The study represents the first time a top analyst working within a mainstream global corporate entity has taken the ‘limits to growth’ model seriously. Its author, Gaya Herrington, is Sustainability and Dynamic System Analysis Lead at KPMG in the United States. However, she decided to undertake the research as a personal project to understand how well the MIT model stood the test of time.
The study itself is not affiliated or conducted on behalf of KPMG, and does not necessarily reflect the views of KPMG. Herrington performed the research as an extension of her Masters thesis at Harvard University in her capacity as an advisor to the Club of Rome. However, she is quoted explaining her project on the KPMG website as follows:
“Given the unappealing prospect of collapse, I was curious to see which scenarios were aligning most closely with empirical data today. After all, the book that featured this world model was a bestseller in the 70s, and by now we’d have several decades of empirical data which would make a comparison meaningful. But to my surprise I could not find recent attempts for this. So I decided to do it myself.”
Titled ‘Update to limits to growth: Comparing the World3 model with empirical data’, the study attempts to assess how MIT’s ‘World3’ model stacks up against new empirical data. Previous studies that attempted to do this found that the model’s worst-case scenarios accurately reflected real-world developments. However, the last study of this nature [Graham Turner’s update, as above] was completed in 2014.
Herrington’s new analysis examines data across 10 key variables, namely population, fertility rates, mortality rates, industrial output, food production, services, non-renewable resources, persistent pollution, human welfare, and ecological footprint. She found that the latest data most closely aligns with two particular scenarios, ‘BAU2’ (business-as-usual) and ‘CT’ (comprehensive technology).
“BAU2 and CT scenarios show a halt in growth within a decade or so from now,” the study concludes. “Both scenarios thus indicate that continuing business as usual, that is, pursuing continuous growth, is not possible. Even when paired with unprecedented technological development and adoption, business as usual as modelled by LtG would inevitably lead to declines in industrial capital, agricultural output, and welfare levels within this century.”
Study author Gaya Herrington told Motherboard that in the MIT World3 models, collapse “does not mean that humanity will cease to exist,” but rather that “economic and industrial growth will stop, and then decline, which will hurt food production and standards of living… In terms of timing, the BAU2 scenario shows a steep decline to set in around 2040.”…
“MIT Predicted in 1972 That Society Will Collapse This Century. New Research Shows We’re on Schedule.” The headline notwithstanding, The MIT team’s study didn’t so much make predictions as it played out a systems dynamics model in order to identify issues that might emerge. And like any model, theirs was rooted in assumptions that could/should have eroded over the last 50 years… which makes the fact that “reality” seems to be tracing the contours thatchy sketched even more notable. Time to revisit those assumptions… Bracing– but important– reading.
[Image above: source]
* Donella Meadows
###
As we get serious, we might send systemic birthday greetings to Thomas Samuel Kuhn; he died on this date in 1996. A physicist, historian, and philosopher of science, Kuhn believed that scientific knowledge didn’t advance in a linear, continuous way, but via periodic “paradigm shifts.” Karl Popper had approached the same territory in his development of the principle of “falsification” (to paraphrase, a theory isn’t false until it’s proven true; it’s true until it’s proven false). But while Popper worked as a logician, Kuhn worked as a historian. His 1962 book The Structure of Scientific Revolutions made his case; and while he had– and has— his detractors, Kuhn’s work has been deeply influential in both academic and popular circles (indeed, the phrase “paradigm shift” has become an English-language staple).
“What man sees depends both upon what he looks at and also upon what his previous visual-conception experience has taught him to see.”
Thomas S. Kuhn, The Structure of Scientific Revolutions
“Political language has to consist largely of euphemism, question-begging and sheer cloudy vagueness…. Such phraseology is needed if one wants to name things without calling up mental pictures of them.”*…
Mental models can be helpful, but they can also obscure as much as they reveal…
“The era of big government is over,” then-US President Bill Clinton proclaimed in 1996. But President Joe Biden’s multi-trillion-dollar spending plans are suggesting precisely the opposite. Behind the politicians stand the policy gurus, eager to put their names on – as the fashionable phrase goes – a new “policy paradigm.”
Paradigm-peddlers have not yet settled on a single label for the post-pandemic era, but frothy ideas abound. Countries should “build back better,” but only after a “great reset.” Economic growth used to be a pretty good thing on its own; these days, it is unmentionable in polite company unless it is “inclusive, equitable, and sustainable.” (I can see why, but must all three adjectives always be strung together?)
…
Harvard University’s Dani Rodrik was right to argue recently that we should beware of economists bearing policy paradigms. Such frameworks are supposed to organize thinking, but more often than not they substitute for it.
Consider a paradigm that the pandemic is supposed to have killed: neoliberalism. Neoliberal once meant a particular approach to free-market economics. Applying the description to leaders like Margaret Thatcher and Ronald Reagan made some sense. But in current parlance, the term also applies to former UK Prime Minister Tony Blair, former German Chancellor Gerhard Schröder, and the social democrats who have governed Chile for 24 of the last 30 years – in fact, to anyone who thinks markets have some role to play in human affairs.
Through repeated, careless use, neoliberal has now become one of those words that, as George Orwell said, “are strictly meaningless, in the sense that they not only do not point to any discoverable object, but are hardly even expected to do so by the reader.”
But meaningless is not the same as useless. If a speaker at an academic seminar, policy conference, or cocktail party tars someone as a neoliberal, two messages are immediately clear: the speaker is good, and the target is bad, unconcerned with the plight of the downtrodden. Tarring someone with this particular epithet is virtue-signaling par excellence. It marks the speaker as a member of a progressive tribe concerned about the world’s poor.
The right has its own ideological identity markers. In the debate about Obamacare and health insurance in the United States, or about vouchers for school funding anywhere, anyone claiming to support “freedom of choice” is not just making a point, but also sending a signal.
Both freedom and choice have multiple meanings that philosophers have been debating at least since classical Greek times: freedom to or freedom from? Choice to do what? Is someone with little money or education really “free to choose,” as the Nobel laureate economist Milton Friedman used to say? In fact, today’s freedom-of-choice advocates probably do not want to pursue those ancient and endless debates; they are simply signaling their membership in the ideological free-market tribe.
…
As the world seeks to ensure recovery from the COVID-19 crisis, simplistic political and economic ideologies will not lead to effective policymaking. Rodrik rightly pines for economic thinking that is unbeholden to cliché or to narrow identity politics. As he says, “The right answer to any policy question in economics is, ‘It depends.’” Circumstances matter, and the devil is in the details.
I want the same thing as Rodrik, but you can’t always get what you want. Because nowadays (at least outside Trumpian circles) identities based on race or religion are unacceptable, ideologies have become the last refuge of the identity-seeking and politically savvy scoundrel, and new economic paradigms the weapon of choice…
In the old joke, a man walks into a psychiatrist’s office and says, “Doctor, my brother’s crazy! He thinks he’s a chicken.” The doctor says, “Why don’t you bring him to me?” And the man replies, “I would, but I need the eggs.”
Political ideologies can be crazy, and those who peddle them often behave like chickens. But how we crave those eggs…
Simplistic political and economic ideologies that serve as identity markers will not lead to effective policymaking; but something in human psychology makes many crave them anyway: “The Perils of Paradigm Economics,” from Andrés Velasco (@AndresVelasco).
[image above: source]
* George Orwell, Politics and the English Language
###
As we acknowledge nuance, we might send qualified birthday greetings to Sidney James Webb; he was born on this date in 1859. An economist, he was an early member of the Fabian Society (joining, like George Bernard Shaw, three months after its founding). He co-founded the London School of Economics (where Andrés Velasco is currently Dean of the School of Public Policy), and wrote the original, pro-nationalisation Clause IV for the British Labour Party.
A committed socialist, Webb and his wife Beatrice were staunch supporters of the Soviet Union and its communist program. Ignoring the mounting evidence of atrocities in the USSR in favor of their commitment to the concept of collectivism, they wrote Soviet Communism: A New Civilisation? (1935) and The Truth About Soviet Russia (1942), both positive assessments of Stalin’s regime. The Trotskyist historian Al Richardson later described Soviet Communism: A New Civilization? as “pure Soviet propaganda at its most mendacious.”
“Time and space are modes by which we think and not conditions in which we live”*…
email readers click here for video
What is space? Three contenders for the theory of everything converge on a single very big idea– that our universe was born in the instant when nothing and nowhere were joined.
Read more at “Goodbye big bang, hello big silence” (summary; full text requires subscription).
* Albert Einstein
###
As we ruminate on relativity, we might spare a thought for Thomas Samuel Kuhn; he died on this date in 1996. A physicist, historian, and philosopher of science , Kuhn believed that scientific knowledge didn’t advance in a linear, continuous way, but via periodic “paradigm shifts.” Karl Popper had approached the same territory in his development of the principle of “falsification” (to paraphrase, a theory isn’t false until it’s proven true; it’s true until it’s proven false). But while Popper worked as a logician, Kuhn worked as a historian. His 1962 book The Structure of Scientific Revolutions made his case; and while he had– and has— his detractors, Kuhn’s work has been deeply influential in both academic and popular circles (indeed, the phrase “paradigm shift” has become an English-language staple).
You must be logged in to post a comment.