By Tom Murphy / Do the Math

Surfing YouTube, I came across an interview of Ezra Klein by Stephen Colbert. He was promoting a new book called Abundance, basically arguing that scarcity is politically-manufactured by “both sides,” and that if we get our political act together, everybody can have more. Planetary limits need not apply. I’ve often been impressed by Klein’s sharp insights on politics, yet can’t reconcile how someone so smart misses the big-picture perspectives that grab my attention.

He’s not alone: tons of sharp minds don’t seem to be at all concerned about planetary limits or metastatic modernity, which for me has been a source of perennial puzzlement.

The logical answer is that I’m not the sharpest tool in the shed. Indeed, many of these folks could run cognitive/logical circles around me. And maybe that’s the end of the story. Yet it’s not the end of this post, as I try to work out what accounts for the disconnect, and (yet again) examine my own assuredness.

Imagined Basis

What is the basis of pundit-level rejection of my premise? Oh yeah: my premise is that modernity is a fleeting, patently unsustainable mode of life on Earth that will self-terminate on a historically relevant (i.e., brief) timescale—likely to convincingly crest the peak this century. Modernity can’t last.

I will reconstruct how I think an ultra-smart person might react, were I to present in conversation the premise that modernity can’t last—based on past interactions with such folks. Two branches stand out.

One branch would be the unwittingly spot-on admission of “I don’t see why not.” I could not have identified the core problem any better, and would be tempted to say: “Wow—what a courageous first step in recognizing our limited faculties. That humble confession is very big of you.” My not having the wit to prove conclusively to such folks that modernity can’t work (and I would say that no human possesses such mental powers) says very little about the complex reality of our future—operating without giving a flip as to what happens in human brains. But it’s also quite far from demonstrating convincingly how something as unsustainable as modernity—dependent on one-time exploitation of non-renewable resources—might possibly address the host of interacting elements that will contribute to its crumbling.

That branch aside, the common reply I want to spend more time on goes something like: “Just look at the past. No one could have foreseen the amazingness of today, and we ought to recognize that we are likewise ill-equipped to speculate on the future. In other words, anyone expressing your premise in the last 10,000 years would have turned out to be wrong [well, so far]. Chances, are: so are you.”

Damn. Blistering. How can one get up from that knockout? And the thing is, it’s a completely valid bit of logic. I also appreciate the intellectual humility involved. Why, then, am I so stubborn on this point? Is it because I want to be popular or rich? Then I’m even stupider than I thought, because those things are basically guaranteed to be incompatible with such a message. Is it because I crave end-times, having been dealt a bad hand and never “good at the game?” Nope: I thrived as an all-in astrophysicist and had/have a rather privileged and comfortable life that I would personally, selfishly prefer not to have disrupted. Is it out of fear of collapse? Getting warmer: that was a big early motivation—the alarming prospect of losing what I held until recently to be a glorious civilization. But at this point all I can say is that based on multiple lines of evidence I really think it’s the truth, and can’t easily or honestly argue myself out of this difficult spot. Denial, anger, bargaining, and depression don’t help us come to terms with the hard reality..

Returning to the putative response: I’ll name it as lazy. It’s superficial. It’s a shortcut, sidling up to: “Collapse hasn’t happened yet—in fact quite the opposite—and thus most likely will not.” It declines to examine the constituent pieces and arguments, falling back on a powerful and persuasive bit of logic straight out of the left brain. It has all the hallmarks: certain, crisp, abstract, decontextualized, logical, clever.

It carries the additional dual advantage of simultaneously avoiding unpleasant confrontation of a scary prospect and inviting starry-eyed wonder at magic the future might bring. No wonder it’s so magnetically attractive as a go-to response!. We’re both driven to it and attracted by it! The very smartest among us, in fact, often have the most to lose, and may therefore be among the most psychologically attached to modernity. We mustn’t forget that every human has a psychology, and is capable of impressive levels of denial for any number of reasons.

Some Metaphors

Its time for a few metaphors that help to frame my approach. I offer two related ones, because none are perfect. Together, they might work well enough for our purposes.

TAKE ONE

Imagine that someone tees up a golf ball in an indoor space full of hard objects: concrete walls and steel shelves—maybe loaded with heavy glass goblets and vases, etc. Poised to deliver a smashing blow to the ball with an over-sized driver, they ask me: “What do you think will happen if I hit this ball?” Imagining a comical movie scene where the ball makes a series of wild-ass bounces shattering priceless collectables as it goes, it might seem impossible to guess what all might or might not happen. So, I “cheat” and say: “The ball will come to rest.”

And guess what: I’m right! No matter how crazy the flight, it is guaranteed that in fairly short order, the ball will no longer be moving. I could even put a timescale on it: stopped within 10 seconds, or maybe even 5—depending on the dimensions of the room. I can say this because each collision will remove a fair bit of energy from the ball, and the smaller the room, the shorter the time between energy-sapping events.

During the middle of the experiment, it is clear that mayhem is happening, and it’s essentially impossible to predict what’s next. That’s where we are in modernity. So, yes: some intellectual humility is called for. We could not have predicted any of the particulars, after all. But one can still stand by the prediction that the ball will come to rest, much as one can say modernity will wind itself down.

TAKE TWO

The golf ball metaphor does 80% of the work, but I don’t fully embrace it because the ball is at maximum destructive capacity at the very beginning, its damage-potential decaying from the first moment. Modernity took some time to accelerate to present speed, now at a fever pitch. For this, I think of a rock tumbling down a slope.

I do a fair bit of hiking, sometimes off trail where—careful as I am—I might occasionally dislodge a rock on a steep slope. What happens next is entirely unpredictable (even if deterministic given initial conditions). Most of the time the rock just slides just a few centimeters; sometimes it will lazily tumble a few meters; or more rarely it will pick up speed and hurtle hundreds of meters down the slope in a kinetic spectacle. Kilometer scales are not entirely out of the question in some locations.

Still, for all these scenarios, I am sure of one thing: the rock will come to rest—possibly in multiple fragments. I can also put a reasonable timescale on it, mid-journey, based on its behavior to that point. I can tell if it’s picking up speed. I can evaluate if the slope is moderating or will soon come to an end. It’s not impossible to make a decent guess for how long it might go, even if unable to predict what hops, collisions, or deflections it might execute along the way.

Maybe the phrase “a rolling stone gathers no moss” can be re-interpreted as: kinetic mayhem is no basis for a healthy, relational ecology. If tumbling boulders were the normal/default state of things, mountains would not last long (or more to the point: never come into being!). Likewise, one species driving millions of others to extinction in mere centuries is not a normal, sustainable state of affairs. That $#!+ has to stop.

Modernity’s Turn

Modernity is far more complex than a tumbling rock. But one side effect of this is a multitude of facets to consider. When many of them line up to tell a similar story…well, that story becomes more compelling. I offer a few, here.

POPULATION

Global human population has been a super-exponential, in that the annual growth rate as a percentage of the total has steadily climbed through the millennia and centuries (0.04% after agriculture began, up to 2% in the 1960s). It is no shock to anyone that we may be straining (or overtaxing) what the planet can support. Indeed, the growth rate has been decreasing for the last 60 years, and the drop appears to be accelerating lately. Almost any model predicts a global peak before this century is over, and possibly as soon as the next 15–20 years. This is, of course, highly relevant to modernity. Economies will shrink and possibly collapse (being predicated on growth) as population falls from a peak. Such a turn could precipitate a whole new phase that “no one could have seen coming.” I’m looking at you, pundits!

The argument of “just look to the past” and imagining some sort of extrapolation begins to seem dubious or even outright silly in the context of a plummeting population. Let’s face it: we don’t know how it plays out. Loss of modern technological capabilities is not at all a mental stretch, even if such “muscles” are rarely exercised.

RESOURCES

Modernity hungry!. Fossil fuels have played a huge role in the dramatic acceleration of the past few centuries. We all know this is a limited-time prospect. Oil discoveries peaked over a half-century ago, so the writing is on the wall for production decline on a timescale of decades. Pretending that solar and wind will sweep in as substitutes involves a fair bit of magical thinking and ignorance of myriad practical details (back to the “I don’t see why not” response). We face an unprecedented transition as fossil fuels wane, so that the acceleration of the past is very likely to run out of steam. Even holding steady involves an unsubstantiated leap of faith—never fleshed out as to how it all could possibly work. “I don’t see why not” is about the best one can expect.

Mined materials are likewise non-renewable and being consumed at an all-time-high rate. Ore grade has fallen dramatically, so that we now must pursue increasingly marginal and deeper deposits and thus impact more land, while discharging an ever-increasing volume of mine tailings. This happened fast: most material extraction has occurred in the last century (or even 50 years). We would be foolish to imagine an extrapolation of the past or even maintaining similar levels of activity for any long duration. More realistically, these practices will be undercut by declining population and energy availability. I’ve spent plenty of time pointing out that recycling can at best stretch out the timeline, but not by orders of magnitude.

WATER/AGRICULTURE

Agricultural productivity has also steadily increased, but on the back of “mining” non-renewable resources like ground water and soils—not to mention an extraordinary dependence on finite fossil fuels. Okay: at least water and soils can renew on long timescales, but our rate of depletion far outstrips replenishment. Land turned to desert by overuse stops even trying to maintain soils, while also suppressing water replenishment by squelching rainfall. This is yet another domain where the fact that the past has involved a steady march in one direction is quite far from guaranteeing that direction as a constant of nature. Its very “success” is what hastens its failure. The simple logic of “hasn’t happened yet” blithely bypasses a lot of context sitting in plain sight.

CLIMATE CHANGE

I don’t usually stress climate change, because I view it as one symptom of a more general disease. Moreover, should we magically eliminate climate change in a blink, my assessment is hardly altered since so many other factors are contributing to the overall phenomenon of modernity’s unsustainability. I include climate change here because it seems to be the one element that has percolated to the attention of the pundit-class as a potential existential threat. It isn’t yet clear how modernity trucks on without fossil fuels. Yet, even if we were to curtail their use by 2050, the climate damage may be great enough to reverse modernity’s fortunes (actually, the most catastrophic legacy of CO₂ emissions may be ocean acidification rather than climate change). Again, the “logic” of extrapolation becomes rather dubious. The faith-based assumption is that we will “technology” our way out of the crisis, which becomes perfectly straightforward if ignoring all the other factors at play. Increased materials demand to “technofix” our ills (and the associated mining, habitat destruction, pollution) puts a fly in the ointment. But most concerning to me is what we already do with energy. Answer: initiate a sixth mass extinction by running a resource-hungry, human supremacist, global market economy. Most climate change “solutions” assign top priority to maintaining the destructive juggernaut at full speed—without question.

ECOLOGICAL COLLAPSE

This brings me to the ultimate peril. As large, hungry, high-maintenance mammals on this planet, we are utterly dependent on a healthy, vibrant, biodiverse ecology—in ways we can’t begin to fathom. It’s beyond our meat-brain capacity to appreciate. Long-term survival at the hands of evolution has never once required cognitive comprehension of the myriad subtle relationships necessary for a stable community of life. An amoeba, mayfly, newt, or hedgehog gets on just fine without such knowledge. What is required is fitting into the niches and interrelationships patiently worked out through the process of evolution. Guess what: in a flash, we jumped the tracks into a patently non-ecological lifestyle not vetted by evolution to be viable. It appears to be not even close.

This is not just a theoretical concern. Biologists are pretty clear that a sixth mass extinction is underway as a direct result of modernity. The dots are not particularly hard to connect. We mine and spew/dispose materials alien to the community of life into the environment. Good luck, critters! We eliminate or shatter wild space in favor of “developed” land: exterminating, eradicating, displacing, and impoverishing the life that depends on that land and its resident web of life. The struggle can take decades to resolve as populations ebb—generation after generation—on the road to inevitable failure. Even this decades-long process is effectively instant compared to the millions of years over which the intricate web was crafted.

I have pointed out a number of times that we are now down to 2.5 kg of wild land mammal mass per human on the planet. It was 80 kg per person in 1800 and 50,000 kg per person before the start of the agricultural revolution—when humans held a roughly proportionate share of mammal biomass compared to the other mammal species. In my lifetime (born 1970), the average decline in vertebrate populations has been roughly 70%. Fish, insects, birds decline at 1–2% per year, which compounds quickly. Extinction rates are now hundreds of times higher than the background, almost all of which has transpired in the last century.

Just like the golf ball in the room or the rock tumbling down the mountainside, these figures allow us to place approximate, relevant timescales on the phenomenon of ecological collapse—and that timescale is at the sub-century level. We’re watching its opening act, and the rate is alarming. The consequences, however, are easily brushed aside in ignorance. Try it yourself: mention to someone that humans can’t survive ecological collapse and—Family Feud style—I’d put my money on “I don’t see why not” being among the most frequent responses.

So, Don’t Give Me That…

I think you can see why I’m not swayed by the tidy and fully-decontextualized lazy logic of extrapolation offered by some of the smartest people. This psychologically satisfying logic can have such a powerfully persuasive pull that it short-circuits serious considerations of the counterarguments. This is especially true when the relevant subjects are uncomfortable, inconvenient, unfamiliar, and also happen to be beyond our capacity to cognitively master. Just because we can’t understand something doesn’t render it non-existent. Seeking answers from within our brains gets what it deserves: garbage in—garbage out.

We used the metaphors of a golf ball or rolling stone necessarily coming to rest. Likewise, a thrown rock will return to the ground, or a flying contraption not based on the aerodynamic principles of sustainable flight will fail to stay aloft. Modernity has no ecological context (no rich set of evolved interrelationships and co-dependencies with the rest of the community of life) and is rapidly demonstrating its unsustainable nature on many parallel, interconnected fronts. This would seem to make the default position clear: modernity will come to rest on a century-ish timescale, the initial reversal possibly becoming evident in mere decades. [Correction: I think it will likely be mostly stopped on a century timescale, but it may take millennia to fully melt into whatever mode comes next.]

Retreating to the logic of extrapolation or basic unpredictability amounts to a faith-based approach that deflects any actual analysis: a cowardly dodge. Given the multi-layer, parallel concerns all pointing to a temporary modernity, it would seem to put the burden of proof that “the unsustainable can be sustained” squarely on the collapse-deniers. The default position is that unsustainable systems fail; that non-ecological modes lack longevity; that unprecedented and extreme departures do not become the rule; that no species is capable of going-it alone. Arguing the extraordinary obverse demands extraordinary evidence, which of course is not availing itself.

When logic suggests an attractive bypass, recognize that logic is only a narrow and disconnected component of a more complete, complex reality. Most importantly, the logic of extrapolation only serves to throw up a cautionary flag, without even bothering to address the relevant dynamics. That particular flag is later recognized as a misfire once the appropriate elements are given due consideration: this time is different, because modernity is outrageously different from the larger temporal and ecological context. Pretending otherwise requires turning a spider’s-worth of blind eyes to protect a short-term, ideological, emotionally “safe” agenda. Pretend all you want: it won’t change what’s real.

Photo by CHRIS ARJOON on Unsplash

Editor’s note: “A study published in 2024 found that a change in insecticide use was a major factor in driving butterfly declines in the Midwest over 17 years. The authors, many of whom were also part of the current study, noted that the drop coincided with a shift to using seeds with prophylactic insecticides, rather than only spraying crops after an infestation.”

Photo by Aaron Burden on Unsplash

“Only the Pacific Northwest didn’t lose butterfly population on average. This trend was largely driven by an irruptive species, meaning one with extremely high abundance in some years – the California tortoiseshell. When this species was excluded from the analyses, trends in the Pacific Northwest were similar to other regions.”

“Imagine a world without the delicate flutter of butterfly wings or the vibrant splashes of color they bring to our gardens. Sadly, this could become a reality sooner than we think. A recent study published in the journal Science has revealed a shocking decline in butterfly populations across most regions of the United States.”

By Bobby Bascomb / Mongabay

A study in the United States found a dramatic 22% decline in butterfly populations between 2000 and 2020.

Previous research has focused on a specific butterfly species or regions of the country. For this study, researchers wanted to understand overall butterfly population trends across the U.S.

They gathered records of 12.6 million individual butterflies across 554 species, from more than 76,000 surveys, many conducted by citizen science groups in nearly 2,500 locations.

The researchers found that total butterfly numbers were down by 22% over the first two decades of this century. It’s a concerning trend, said Collin Edwards, lead author of the study and an ecological modeler with the state of Washington Fish and Wildlife Department.

To put it in context, “for someone who was born in 2000, one out of every five butterflies had disappeared by the time they became an adult,” Edwards told Mongabay by phone.

The 22% decline is an average. Of the 554 species examined, 107 declined by at least 50% and 22 species declined by more than 90%.

At the same time, nine species saw population increases. The eastern population of the monarch (Danaus plexippus) doubled in 2025, though its overall population is still down roughly 80%, prompting the iconic butterfly to be proposed for the U.S. endangered species list.

Several of the nine species that increased in population are predominantly found in Mexico; the U.S. is the northern edge of their range. Edwards said with a warming climate, many butterfly species are shifting their habitats north.

“If the southern edge of their limit is just barely cold enough for them, as the climate warms, that’ll get worse. But the northern edge where it used to be a little bit too cold will start to get warm enough,” Edwards said.

This study adds to a growing body of research showing a global decline in insect populations, raising concerns about a depleting food source for many animals including birds and frogs, which are facing population crashes in their own right.

Furthermore, while bees get most of the glory, butterflies are also critical pollinators. A 2021 study in Texas found butterflies provide about $120 million per year in pollination services for cotton.

Tierra Curry, a senior scientist with the Center for Biological Diversity, told Mongabay by email that “this is a landmark study” that “shows that we need to take urgent action to safeguard butterflies. Every action we take to help pollinators also helps us because our fate is directly tied to their health.” Curry wasn’t involved with this research.

Edwards said this study focused on butterflies because that’s the order of insects they had data for, but he added there’s “every reason to think that if butterflies are declining there are probably similar declines in other groups of insects,” especially since the drivers of decline — habitat loss, climate change and pesticides — affect most insects.

Banner Photo by Joshua J. Cotten on Unsplash A gulf fritillary butterfly on a zinnia.

Editor’s note: “MMA is methyl methacrylate, a chemical compound that was banned by the FDA in the 1970s for use in nail enhancements due to its potential health hazards,” Hanna says. Celebrity manicurist Julie Kandalec adds, “It’s an ingredient commonly found in acrylic liquids, called monomer.”

One of the easiest ways to check if there is MMA in your acrylic or nail supplies is to check the ingredient list of your products. It should not be listed as an ingredient in any reputable acrylic nail product. A few additional tips include: Smelling a very harsh odor when applying and filing your acrylic nails – some people say it smells like cat urine.

“Mitsubishi Chemical Group (MCG) has concluded a license agreement with SNF Group regarding MCG’s N-vinylformamide (NVF) manufacturing technology. NVF is a raw material of functional polymers. Using the manufacturing technology licensed under this agreement, SNF will start the commercial production of NVF at its new plant in Dunkirk, France as of this June. NVF is a monomer used as a material for papermaking chemicals, water treatment agents, and oil field chemicals.”

Photo by Patrick Hendry on Unsplash