I. William Whewell and the Naming of a Section
William Whewell (1794–1866) was an important person in British science in the 1800s. He was a polymath, mathematician, and natural philosopher from Trinity College, Cambridge, where he was Master for more than 20 years. He made important contributions to the philosophy of science, the history of scientific ideas, and the idea of the "scientific method." He lived in a time when natural philosophers did a lot of work. He wrote about a lot of things, including mechanics, physics, geology, astronomy, and economics. He also wrote poetry, the Bridgewater Treatise, translations of Goethe's works, sermons, and theological tracts. "Science is his strong point, and knowing everything is his weak point," as one person put it.
Whewell was probably the best and most productive scientist writer of his time. For the words "electrode," "ion," "cathode," "anode," "physicist," and, at the request of the poet Samuel Taylor Coleridge in 1833, "scientist," which replaced the older terms "natural philosopher" or "man of science," we owe him. He also gave names to at least three geological periods: the Miocene, the Eocene, and the Pliocene. He changed the French words "carnivore" and "insectivore" and added the lovely word "consilience." But most importantly, his effect on terminology was the most important and long-lasting in the field of geology.
Whewell is best known for his huge book History of the Inductive Sciences (1837) and the book that goes with it. The Philosophy of the Inductive Sciences, Founded Upon Their History (1840) aims to offer a historical reconstruction of the sciences' evolution and a systematic philosophical analysis of the transformation of empirical data into general theories via induction. He thought of himself as bringing back Francis Bacon's method, which was to look at ideas ("explication of conceptions") and try to connect them to observations through the "colligation of facts" to make science. But he kept saying that you can't mechanically find something because "invention, sagacity, genius" are needed at every step. Whewell believed that scientific discovery wasn't just guessing or putting together a lot of facts; it was a creative process in which the mind actively organizes what it has learned.
Whewell first used the words that would come to define the great geological debate of the century in an anonymous review of the second volume of Charles Lyell's Principles of Geology from 1832. He asked, "Have the changes that have taken us from one geological state to another been, on average, the same level of intensity, or have they been made up of periods of extreme and destructive action, broken up by periods of relative calm?" Whewell asserted that these two viewpoints divided Earth scientists into two opposing factions: "the Uniformitarians and the Catastrophists," a crucial differentiation that endures in contemporary geological literature.
In his book History of the Inductive Sciences, Whewell is the first person to clearly and systematically define catastrophism. He uses the word "catastrophes" to talk about geological changes that happen very quickly and are very strong, and that are not part of the "normal rhythm" of nature. This definition "comes from" the way the geological and paleontological record is set up, which means that when there are sudden changes or gaps in the stratigraphy, it is impossible to read the data they give in a straight line. He uses catastrophism as a way to describe things in order to fight any theory that tries to explain the gaps in the geological record.
Whewell doesn't just use the word "catastrophes" in the same work. He also uses other words to talk about different parts of the same idea, like violent changes, paroxysmal forces, times of violent disturbance, or great revolutions, as well as breaks or stops in the course of nature. This range of terms does not indicate theoretical ambiguity; rather, it illustrates his intentional effort to empirically delineate the intensity, episodicity, and, most crucially, the inductive discontinuity that emerges from the geological record, without reducing them to a singular or universal interpretive framework. For Whewell, acknowledging catastrophe was an empirical imperative, a recognition that evidence sometimes contradicts gradualist interpretation, rather than a metaphysical commitment to divine intervention or supernatural disruption.
II. The Intellectual Scene: Cuvier, Lyell, and the Big Argument
To fully understand how important Whewell's intervention was, you need to know what kind of intellectual environment he worked in. The most important person in the catastrophist tradition that Whewell was naming and refining was the French naturalist Baron Georges Cuvier (1769–1832), who was one of the founders of comparative anatomy and paleontology. While working in the Paris Basin with Alexandre Brongniart, Cuvier saw something that made any simple story of geological continuity hard to believe: instead of finding a continuous succession of fossils, he found several gaps where all evidence of life would disappear and then suddenly reappear in very different forms. He thought of these gaps as mass extinction events and blamed them on a series of short but terrible events in Earth's history, which he called "révolutions."
Cuvier's 1812 Recherches sur les ossemens fossiles (Researches on Fossil Bones), which included the important Discours préliminaire (which was later published on its own as the Discourse on the Upheavals of the Surface of the Globe), was the first book on catastrophism. Cuvier himself, influenced by Enlightenment thought and the intellectual milieu of the French Revolution, eschewed religious or metaphysical speculation in his scientific writings. He never said that divine creation was the reason for repopulation after extinction events, and he eventually thought that the Earth was millions of years old. British natural theologians like William Buckland and Robert Jameson were mostly responsible for putting catastrophism and biblical literalism together. They did this by using Cuvier's work to explain Noah's Flood, which Cuvier did not want or support.
The uniformitarian tradition, based on the work of Scottish geologist James Hutton (1726–1797), was on the other side of the debate. Hutton's Theory of the Earth (1788) said that the same geological processes we see today have always been at work. Hutton's view of time was vast and almost incomprehensible. He saw a planet shaped by the slow, cyclical interactions of erosion, deposition, uplift, and subsidence. This led to his famous statement that the geological record showed "no vestige of a beginning, no prospect of an end."
Charles Lyell (1797–1875) took Hutton's ideas and turned them into the main way people thought about geology in the 1800s. His three-volume work, Principles of Geology (1830–1833), subtitled "An attempt to explain the former changes of the Earth's surface by reference to causes now in operation," was an ambitious polemic for strict uniformitarianism. It posited that the same natural laws had always functioned (a methodological assumption few would dispute) and that they had consistently operated at a similar rate and intensity (a substantive hypothesis that was considerably more contestable). As historian Stephen Jay Gould later explained, Lyell mixed up two methodological assumptions (uniformity of natural law and uniformity of process) with two substantive hypotheses (uniformity of rate and uniformity of state). This mix-up made the debate less clear for more than a hundred years.
It is important to note that Whewell was a respectful critic of Lyell, not a dogmatic catastrophist. His stance was complex: he upheld the empirical existence of discontinuities in the geological record while acknowledging that numerous processes function incrementally. He said that there wasn't enough evidence to support Lyell's more extreme claims of absolute uniformity of rate. He said that the geological evidence itself should decide whether change had been gradual or sudden, not a prior philosophical commitment to either side.
III. The Discarding of Classical Catastrophism
Geosciences dismissed catastrophism, not due to a denial of abrupt or violent events in geological history, but because classical catastrophism inadequately differentiated the local from the universal, frequently transforming significant yet localized discontinuities into generalized global "revolutions." As stratigraphy, geochronology, and the global correlation of geological records advanced, it became evident that numerous discontinuities are asynchronous, spatially confined, and integral to long-term, recurring processes, rendering catastrophism insufficient as a universal interpretive framework.
However, the success of uniformitarianism from the middle of the 19th century to the middle of the 20th century was sometimes too much. The narrative of J. Harlen Bretz (1882–1981) and the Channeled Scablands of eastern Washington represents one of the most educational and cautionary chapters in geological history. Bretz started writing papers in 1923 that said the strange landscape of deep coulees, dry cataracts, giant potholes, and exposed basalt on the Columbia Plateau could only have been made by a huge flood. For decades, people thought the idea was silly and a throwback to pre-scientific catastrophism. The geological establishment, many of whom had never been to the scablands, tried to explain the features using uniformitarian mechanisms. For example, Richard Foster Flint of Yale suggested in 1938 that the land was slowly eroded by "leisurely streams with normal discharge."
It took Bretz decades of hard work to clear his name. J.T. Pardee's discovery that Glacial Lake Missoula was the source of the flood, aerial photography showing huge current ripples that could only be seen from above, and finally NASA satellite images from the 1970s all proved without a doubt that the Scablands were caused by a disaster. In 1965, a group of geologists who were visiting the area sent Bretz a telegram that has become famous in the history of science: "We are all now catastrophists." The Geological Society of America gave the Penrose Medal, the highest honor in the field, to 96-year-old Bretz in 1979. He told his son, "All of my enemies are dead, so I have no one to gloat over."
The Alvarez hypothesis was even more important for bringing back catastrophist thinking. In 1980, a team led by Nobel Prize-winning physicist Luis Alvarez and his geologist son Walter published a groundbreaking paper in Science. It said that sedimentary layers at the Cretaceous–Paleogene (K–Pg) boundary around the world had iridium levels that were hundreds of times higher than normal. They thought that a huge asteroid impact caused the mass extinction that ended the age of the dinosaurs about 66 million years ago because iridium is very rare in the Earth's crust but common in asteroids. In 1991, the hypothesis was spectacularly confirmed with the discovery of the Chicxulub crater on Mexico's Yucatán Peninsula. The crater is a 180-kilometer-wide impact structure buried beneath younger sediments. An international panel of 41 scientists looked at 20 years of research in 2010 and agreed that the asteroid impact was the main reason for the K–Pg extinction.
The Missoula Floods, the Chicxulub impact, and other confirmed disasters helped to create what is sometimes called "neocatastrophism" or "modern actualism." This is the idea that while geological change is usually slow, the Earth system can sometimes experience quick, high-magnitude events that leave permanent marks in the stratigraphic record. Bretz himself humbly summed it up when he got the Penrose Medal: "Maybe I can be credited with bringing back and making legendary catastrophism less mysterious and questioning a too strict uniformitarianism." The key distinction between contemporary neocatastrophism and its classical counterpart is that modern science necessitates catastrophic assertions to be substantiated by globally synchronized evidence, distinctly articulated mechanisms, and exact geochronological parameters, a level of methodological precision absent in classical catastrophism.
IV. The Anthropocene: Is History Repeating?
The same methodological flaw that led to the failure of classical catastrophism accounts for the International Commission on Stratigraphy's stance on the term Anthropocene. The Subcommission on Quaternary Stratigraphy (SQS) voted in March 2024 to formally reject the proposal to start a new geological epoch in the middle of the 20th century, with the plutonium-bearing sediments of Crawford Lake in Ontario, Canada, as the proposed "golden spike." The International Union of Geological Sciences (IUGS) later upheld this decision. The Anthropocene Working Group (AWG) had been working on the proposal for 14 years.
The refusal to officially designate the Anthropocene does not imply a denial of the profound human influence on the Earth system. No serious scientist disagrees that biogeochemical cycles have changed a lot, that species have moved around a lot, that new materials like plastics and concrete are spreading around the world, or that greenhouse gas levels in the atmosphere are rising faster. Instead, the rejection shows that there is a reluctance to turn strong "signals" that are not evenly spread out and happen at different times into a universal stratigraphic boundary too soon. Jacquelyn Gill, a palaeoecologist at the University of Maine, said that the Anthropocene "serves humanity best as a loose concept that we can use to define something that we all widely understand, which is that we live in an era where humans are the dominant force on ecological and geological processes." However, this is not the same as a formal stratigraphic unit with a single, globally synchronized, and recognizable starting point in the geological record.
Some people in the AWG and outside of it have protested the decision, pointing to evidence from twelve places around the world, including the Baltic Sea, Antarctica, San Francisco Bay, and coral reefs in the Gulf of Mexico, that show very similar signs of change in the middle of the 20th century: radioactive fallout, microplastics, pesticide residues, and fly ash from burning fossil fuels. Some people, on the other hand, say that eighty years is "a drop in the ocean in geological terms," and that the fact that there is no one, uncontested date for when humanity's broad planetary influence began raises the question: why not the rise of agriculture? What about the changes to the environment that happened after Europeans colonized the Americas? shows that there is a basic conflict between the idea and the rules of formal stratigraphy.
The argument brings us back to the historical lesson of catastrophism: that changes in the strength of local or regional variations are not enough on their own to create a new geological time. The Anthropocene could be one of the most important events in Earth's history, but "event" and "epoch" are not the same thing, and the difference is important. The suggested alternative—viewing the Anthropocene as an informal descriptor, similar to the Great Oxygenation Event—maintains the scientific relevance of the concept while adhering to the methodological principles that define formal stratigraphy.
V. Neo-Catastrophist Discourse in the Modern Climate Discourse
So, catastrophism was dropped in the geosciences not because it saw the gaps in the natural record but because it often made the part into the whole. The current climate discourse, notwithstanding its theoretical advancement, faces a comparable peril: inferring conclusions from localized or regional occurrences depicted as global, coordinated, and unavoidable. Neo-catastrophist rhetoric has evolved from a theory of "cataclysms" to a narrative describing the swift and widespread transition of the climate system to a new, unstable state.
Glacial Retreat and the Issue of Threshold Extrapolation
A common example is how quickly some glaciers are melting, especially in Greenland or in the Andes and Alps mountains. People often say that the local collapse of glacier fronts is a sign of a global climate threshold. Glaciers, on the other hand, are some of the most sensitive and quick to react parts of the Earth system. They respond strongly to even small changes in temperature, precipitation, or ocean circulation. These responses are affected by very local factors like the shape of the bedrock, the amount of sunlight that hits it, the amount of debris that covers it, the way icebergs break off, and the way the atmosphere moves in the area.
Just because a glacier is the first to cross a certain line doesn't mean that the whole cryosphere, or even the whole climate, is at that line. For example, the Jakobshavn Isbræ in Greenland has moved back a lot, but this is mostly because the ocean current that cuts through its end has gotten warmer. This is something that can't be done at most other glacier systems. The Andes' tropical glaciers are also disappearing quickly. Some of them are expected to be gone completely in just a few decades. This is because they are very sensitive to even small amounts of warming at high altitudes, not because the global ice budget is changing in a proportional way. The Antarctic ice sheet, on the other hand, has about 26.5 million cubic kilometers of ice and works on time scales of hundreds to thousands of years, responding to a completely different set of forces.
The mistake here is not in the observation itself, but in the transfer of scale. The local event is being used to predict a global indicator, but there isn't enough synchronization or documentation of a common mechanism across all latitudes. One glacier's tipping point isn't the same as the planet's tipping point.
Droughts, desertification, and differences in water flow
A comparable issue emerges in the discourse on droughts and desertification. Long-lasting droughts in the Mediterranean, western North America, or the African Sahel are often grouped together into a single story of global hydrological collapse. But the hydrological system is very different and not always in sync. The "wet-gets-wetter, dry-gets-drier" paradigm, which says that drought in one basin can happen at the same time as more rain in another, is a useful first approximation, but many studies have shown that it is too simple to work at regional and seasonal levels.
Local breakdowns of agricultural or ecological systems are often caused by a mix of climate change and social and economic factors. These include overpumping of aquifers, converting wetlands, cutting down trees, overgrazing, expanding irrigation-intensive agriculture, and poorly planned urbanization. They don't always mean that the climate is changing on a global scale. People often use the drying up of the Aral Sea as an example of a climate disaster, but the main reason it happened was because the Soviets diverted the Amu Darya and Syr Darya rivers to water cotton plants. This was a disaster of human engineering, not a change in the planet's climate. The classic catastrophist mistake of combining different time and space scales into one story of crisis is made again when local drought is shown to be a direct result of global climate change.
Carbon Dioxide: A Worldwide Issue with Local Examples
The case of carbon dioxide (CO₂) is even more typical. The rise in CO₂ levels in the atmosphere is definitely a global issue and a key part of climate change. The Keeling Curve, which has been kept at the Mauna Loa Observatory since 1958, shows a rise from about 315 ppm to more than 420 ppm. This is the biggest rise in at least 800,000 years of ice-core records and probably in the past several million years. This is a real global signal, and there is no doubt about it.
But people often add neo-catastrophist oversimplifications to their explanations of its role. Paleosols, lake sediments, and coastal deposits are examples of local records that show sudden changes in the carbon cycle in the past. These are sometimes used as direct comparisons to the current rise in CO₂ levels around the world. The Paleocene–Eocene Thermal Maximum (PETM), which happened about 56 million years ago, is a common point of reference. It was a quick release of carbon that raised global temperatures by 5 to 8 degrees Celsius and caused a lot of damage to the environment. But the PETM took about 20,000 years to happen, which is much slower than the current rate of human-caused emissions. The analogy is only scientifically useful when it is carefully compared to rates, stocks, and mechanisms. Otherwise, the sudden change in the area becomes a story that sets the stage for a global disaster, even though there isn't an inductive bridge.
The same level of caution applies to references to the end-Permian extinction, which happened about 252 million years ago. During this time, huge amounts of CO₂ were released by the Siberian Traps' volcanic activity, causing the worst mass extinction in Earth's history, killing off about 90% of marine species and 70% of terrestrial vertebrate species. The end-Permian provides significant insights regarding the potential repercussions of rapid carbon emissions into the atmosphere; however, the geological context—characterized by the arrangement of continents, the condition of ocean circulation, and the composition of the biosphere—was so fundamentally distinct from the present that direct extrapolation necessitates exceptional caution.
VI. The Methodological Core: Scale, Synchrony, and Inductive Discipline
The prevalent methodological issue in these instances is the excessive valuation of the local record's representativeness. Local systems often make climate signals stronger by responding first, most strongly, and most quickly. They are very useful for understanding processes because they act as early warning systems, natural laboratories for studying feedback mechanisms, and sensitive recorders of change. However, they are also dangerous because they can replace the global system on their own. To go from the local to the global, we need to see the same thing happen again and again, and we also need to see that the same feedback works at different levels at the same time.
The Earth system works on a wide range of time and space scales, from the daily cycle of photosynthesis to the millions of years-long cycles of plate tectonics. At one scale, events that are catastrophic may just be normal changes. A single hurricane is a disaster for the area it hits, but on a global scale, it's just a normal part of how the atmosphere moves in the tropics. A volcanic eruption can destroy a whole area and lower the temperature of the Earth for a year or two. In the grand scheme of things, this is a small change. Scaling is not just a technical improvement; it is the study of which processes are important at which scales and which conclusions can be legitimately applied across scales. It is the methodological basis for all Earth system science.
This is exactly where Whewell's criticism of catastrophism is still important today. The mistake is not in recognizing extreme events but in making generalizations about them without proof. When the idea of catastrophe, or today's "rapid transition," comes before full inductive synthesis, it changes from a way to understand something to a way to filter how we interpret it. Science, on the other hand, doesn't use filters; it uses gradations, uncertainties, and careful escalation.
VII. Honoring the Scaled Reading of the Earth's Record
To understand climate change, you need to make a clear distinction between "signals" from different places, responses from different regions, and trends that affect the whole world. You also need to know how the Earth system works at different times and places. In many ways, the history of geology is the history of learning to make these distinctions more and more accurately.
Catastrophism was historically discarded when geology began to acknowledge this scaled interpretation of the Earth's record, understanding that discontinuities and paroxysms are not inherently synchronous or universal alterations but frequently integral to prolonged, multi-tiered processes. When real global disasters were found later, like the Chicxulub impact, the Missoula Floods, and the end-Permian volcanism, they were accepted because they met the standards of evidence that classical catastrophism had not: global signatures, known mechanisms, and exact time limits.
The same lesson is still very important today: don't downplay climate change, which is a real and measurable change in the Earth's system, and don't make the same methodological mistake of putting narrative intensity before inductive synthesis. The urge to mix up the local with the global, the fast with the catastrophic, and the worrying with the irreversible is not new; it is something that happens all the time when people try to make sense of complex environmental information. But science is there to control these instincts, to demand proof that matches the size of the claim, and to fight against the easy appeal of universal stories.
Neo-catastrophist rhetoric, regardless of its origin in media sensationalism, advocacy-oriented communication, or even earnest scientific popularization, ultimately subverts the cause it claims to support. It doesn't help people understand when it turns complicated scientific data into simple fear-mongering. Instead, it makes people less able to think scientifically and either leads to fatalism ("it's too late") or backlash skepticism ("they've been crying wolf"). Both answers are harmful to making sensible policies.
The way forward is where it has always been: through careful, step-by-step, inductive analysis of evidence. This means carefully separating local signals from regional responses, carefully combining regional responses into global trends, and interpreting global trends with the humility that comes with understanding how complicated the Earth is. One might think that Whewell would have liked it.