By Kevin D. Williamson
Tuesday, March 17, 2026
At what point must we be frank about the fact that Paul
Ehrlich, The Population Bomb author who died last week at the age of 93, was not simply wrong
about almost everything he ever wrote or said or thought, but positively and
culpably dishonest?
If ever there were an intellectual grave that deserves
pissing on posthaste, it is Paul Ehrlich’s. So let us commence.
Ehrlich was an intellectual fraud, something he had in
common with many of the celebrated pseudoscientists, quacks, and cranks who
became intellectual heroes to our era’s progressives, from Sigmund Freud to Noam Chomsky, Rachel Carson, Margaret Sanger, and Robert F. Kennedy Jr. until about five minutes ago.
(Right-wingers don’t go around reading books by crackpots—they put them into
the Cabinet.) Like Karl Marx, another great prophet of the
always-wrong-but-never-in-doubt school, Ehrlich believed that there is a kind
of science of history and that, consequently, future events could be predicted
with great confidence by those who were willing to—all together now!—follow
the science. And so Ehrlich, whose academic specialty was the study of
butterflies, was famous for his startling predictions—his hilarious,
wrong-headed, unsupported, book-mongering predictions. For example:
The day may come when the obese
people of the world must give up diets, since metabolizing their
fat deposits will lead to DDT poisoning. But, on the bright side, it is
clear that fewer and fewer people in the future will be obese!
And:
In 10 years [1980], all important animal life in the sea will be extinct. Large
areas of coastline will have to be evacuated because of the stench of dead
fish.
And:
The battle to feed all
of humanity is over. In the 1970s and 1980s hundreds of millions of people
will starve to death in spite of any crash programs embarked upon now. At this
late date nothing can prevent a substantial increase in the world death rate.
And:
If our current rape of the watersheds, our population growth, and our
water use trends continue, in 1984 the United States will quite literally be
dying of thirst.
Ehrlich was also famous for refusing to own up to any of
his errors in a serious way. He would later insist that The Population Bomb, published in
1968, had been “too optimistic,” and the overpopulation cultists—it is a
religious phenomenon—who looked to him for direction would insist from time to
time that he had been kinda-sorta, if you squint in the right way, vindicated.
That is not how you do the work of a public intellectual
in a responsible way. It is, however, how you sell 3 million books in short
order.
As publicity whores go, Ehrlich was a kinky kind—there
was no public humiliation that he was above. In 1980, Ehrlich made his
now-famous wager with Julian Simon, the libertarian economist and author of The
Ultimate Resource. Ehrlich had said—in his usual all-hype-all-the-time
mode—that “if I were a gambler, I would take even money that England will not
exist in the year 2000.” Simon, who was in possession of a functioning nose and
hence had a good idea of what Ehrlich was peddling, offered a wager: $10,000 that the price of “non-government-controlled
raw materials (including grain and oil) will not rise in the long run.” Ehrlich
chose a basket of commodities—chromium, copper, nickel, tin, and tungsten.
He lost on every count. The predictable apologists
insisted that this was a fluke, that things would have worked out differently
if different commodities had been selected or if a different time frame had
been used. And there were versions of the bet in which Ehrlich would have done
better, but the fact was that, in spite of the biggest decade of population
growth in recorded human history, the price of market-traded commodities in general trended
downward.
Ehrlich eventually paid up.
The outcome was, of course, precisely in accord with
Simon’s view expressed in The Ultimate Resource: that human ingenuity
and market incentives would work together to ensure that the material
conditions of the future were more abundant than those of the past, rather than
being overtaxed by a growing population. The same dynamic explained why Ehrlich
had gotten it so wrong about food abundance and why semi-conspiracy-theory
paradigms such as “peak oil” keep getting it wrong: Ehrlich insisted that he
would have been right if not for Norman Borlaug and the “Green Revolution” in
agriculture, just as the peak-oilers insist that they would have been right
about waning petroleum supplies if not for hydraulic fracturing and horizontal
drilling—all of which is true in the same sense that farm yields would be much
lower if we were still plowing the fields with oxen. When goods become scarce,
prices go up, and when prices go up, there are incentives for new sellers—new
firms, new capital, new ideas—to get into the market. The Malthusians
and their 20th-century epigones always get it wrong because they
make straight-line projections that assume increased demand in the future but
no increased supply.
Everything you need to know about Ehrlich can be summed
up by this: He published a memoir three years ago in which he makes no mention at all of the wager with Julian Simon, by
far the most famous episode in his public life beyond his authorship of the
thoroughly discredited The Population Bomb.
All of us involved in public life make mistakes. In 2012,
I received a telephone call from a press spokesman for Donald Trump (in
retrospect, I assume it was Trump himself), who told me that the
reality-television star intended to run for president and asked whether I would
be interested in interviewing him about his plans. Do you know what I did? I
laughed out loud. I offered to do the interview, of course—it would have been a
hilarious story. Or so I thought.
I’ve been wrong about a lot of things. Chances are, I’ll
be wrong about something this week. But I have always tried to own up to my
errors, misunderstandings, and occasional public displays of ignorance.
But hundreds of millions dead in the Western world
instead of the economic boom of the 1980s? England disappearing from the map
because of famine and drought? For Pete’s sake—Ehrlich wasn’t even right about
obesity, and to the extent that the number of fat people seems to be on the
decline, it is because of the blessings of modern pharmacology and not because
of food scarcity. And no formerly fat person on Earth seems to have been
poisoned by metabolizing DDT lurking in his fat cells.
Ehrlich’s arrogance, dishonesty, and neo-Malthusianism
were bound up with another of his unfortunate tendencies: his racism. The
genesis of The Population Bomb began when Ehrlich made his first trip to
India and decided, first thing, that there were too many Indians in the world.
“I have understood the population explosion intellectually for a long time,” he
wrote. “I came to understand it emotionally one stinking hot night in Delhi a
few years ago.”
I lived in Delhi for a time, too, and it is a
city-and-a-half in all directions, to be sure. It is hot at times, crowded in
parts, and dirty in places, but much the same could be said of any major world
city not located in Switzerland. Is India overpopulated? The country’s
population density, at about 484 people per square kilometer, is significantly
lower than that of the Netherlands (about 545 people per square kilometer),
while the population density of Delhi itself is between that of New York City and Geneva—pretty high, but not off the
charts. Where the Indian urban masses that so repulsed Ehrlich differed from
their American or Swiss counterparts was not that they were so thickly planted
but that they were poor. Do you know how modern residents of Delhi differ from
the average residents of that esteemed city in the 1960s? They are a hell
of a lot less poor, thanks in no small part to a series of liberal, pro-market
economic reforms instituted by Narasimha Rao and Manmohan Singh running in the
direction precisely opposite that imagined by such étatiste interventionists,
planners, and would-be rationers of humanity as Paul Ehrlich.
In one of the great ironies of modern intellectual life,
the problem now faced by such formerly teeming Asian nations as Japan and
China—to say nothing of Western Europe and the United States—is population decline.
China, where the “one child” policy reflected the essence of Ehrlich’s thinking
as practiced by a ruthless police state (there may have been as many as 100 million forced abortions and sterilizations
in a single three-year period), is entering a period of demographic crisis,
offering new subsidies to encourage Chinese people to have more children. Japan is
facing long-term demographic collapse. Most projections have us about 60 years away from a worldwide
decline in human numbers, which will create all sorts of problems for
practically all modern states with entitlement regimes based on traditional
models. Will that create a catastrophe resulting in the deaths of hundreds of
millions or billions of people? Maybe. But one suspects that even in a time of
ubiquitous and highly effective AI, a shrinking global labor pool will put
upward pressure on wages.
But I am not one for making wild, unsubstantiated
predictions—which is one reason I probably won’t leave behind as large an
estate as the late Paul Ehrlich, the arch anti-natalist (“by compulsion if
voluntary methods fail”) who insisted that worldwide disaster was waiting in
the wings but lived well into his 90s. That was long enough to meet his
great-grandchildren, who were born into a world remarkably better than the one
Paul Ehrlich prophesied.