The Population Bomb, Paul Ehrlich, came out in 1968.
It predicted world famines due to uncontrolled population growth. Ehrlich took from several sources, but most of them were fundamentally based on Malthusianism, which came, unsurprisingly, from Thomas Malthus. Malthus noticed that the increasing farming production was linear because it was predicated on increasing the area upon which the farming had to operate. Doubling the yield requires doubling the area farmed. He further noted that population growth is exponential. Since exponential growth outpaces linear growth, there would inevitably be a point where demand outpaced construction, resulting in famine or war.
Malthus wrote this up in 1798, before the Industrial Revolution. Often, critics of Malthus and his adherents point to the impact industrialization would have on farming, changing the linear increase to a more own exponential one. Mechanized agriculture really got going after World War II. In addition, the scientific explosion in the same period culminated in the Green Revolution, a movement beginning at the dawn of the 20th century and continuing through the eighties.
This did involve mechanized agriculture. It also included developing new varieties of cereals, increased use of artificial fertilizer, and new farming techniques. This pushed up yields to keep pace with the continuing growth of population.
Thus, the big criticism of Ehrlich’s work was that it seemed to ignore progress that had already been made and was ongoing. Instead, he painted an alarming collection of scenarios. These days, there are famines, but they are more a consequence of war and political unrest rather than causing it. There is enough food grown to keep people from starving. The issues of getting food to people without wasting it have not yet been completely solved. Still, it is getting there—at least, on the technical side.
So, anyone who takes TPB, and Ehrlich himself, seriously is a fool. There’s no problem with population increase. If something gets in the way, infinite human ingenuity will solve it. We can feed everybody, so everything Ehrlich said is wrong.
Far be it from me to discount human innovation, but I don’t think this is exactly correct.
Years ago, I was in a lunchtime conversation with a co-worker. He said that since the caribou were thriving in the Arctic, all of the efforts to help the caribou—the extra construction to preserve their migration patterns, etc.—were unnecessary. My position was that if the caribou were thriving, it was because of those extra efforts rather than despite them. We agreed to disagree.
In 2026, we have 8.3 billion people.
I believe we can probably feed 10 billion people. But I don’t think that is a complete metric. Right now, we produce 450 million tonnes of plastic/year—up from 2 million tonnes of plastic/year in 1950. One tonne equals 1000 kilograms. So that is 450 billion kilograms/year. There are 8.3 billion people right now, so that results in 54 kilograms/year/person. If we had 1 billion people, that could result in a decrease to 6.5 kg/person or 6.5 billion tonnes/year. That is just one metric.
Scale matters.
(Note: Of course, the production of plastic consumption is even across the world. Given how the developing world is advancing, it might well become so. That would make the problem worse.)
There has been a lot of discussion over the last few years about the decrease in reproductive rate. China is worried about it. Japan is facing it. That said, even with the worldwide reduction of population, we are locked into having over ten billion people by 2061. That peak won’t be reached until 2085, after which it will start to drop. (See here.) Essentially, the currently large, adult cohorts have to grow older and die while the smaller, younger cohorts have to grow up under them. The corporate state wants that expanding market and those young purchasers.
The proposed solution is to increase the birth rate to keep up the size of that younger cohort. Most of the publicity seems to be around the need for productive, younger workers. My feeling is more cynical: we need to keep up that younger buying power to prop up corporate sales. However, according to some sources, jobs are on the decline in the near term. Some of this is likely due to AI, but not all. Productivity per unit person has been rising steadily for a long time. Jobs are a reflection of supply and demand. As demand for a product goes up, supply has to meet it. Jobs have to create that supply.
However, as workers become more productive (add in here AI and automation), the number of jobs required for that supply is either smaller or may be reduced. This creates a strange disconnect: a larger number of people to demand product, fewer people to create product, fewer people with the purchasing power to buy product, reduction in demand.
It is, of course, not that simple in the real world, but the trends are still there.
The idea behind Malthus original idea—that resource supply and resource demand are governed by different paradigms—is still valid. There’s a finite amount of oil in the world and the cost to extract that oil increases over time. Thus, there may be an infinite demand for oil, but there cannot be an infinite supply. This is true for any finite resource. Only the slopes of the curves are different.
Right now, a substantial percentage of the supply of habitable land is dedicated to the production of food. This has been estimated from 32% to over 50%. It has been increasing in correspondence with the population this whole time. The numbers Malthus (and Ehrlich) predicted have not come to pass, but the fact of that disconnect has happened.
We have even developed a conceptual language to describe the problem: sustainable agriculture. Renewable agriculture. The underlying problem—the increase in the number of people—is out of fashion these days, but people still see the consequence: loss of land. Loss of wild areas. Air and water pollution. Crowded cities.
Imagine a world where we had a tenth of the population—800 million people. Finite resources would last longer. Pollution would be considerably reduced.
But we don’t. We have 8.3 billion people now and over 10 billion soon.
As Musk and others have said, the sky is falling. The question is, what do we do about it?
Increasing the birth rate is a non-starter. I don’t know about you, but I’m not enthused about the Asimov world in The Caves of Steel, where we all live in some megalopolis surrounded by vast hills and plains dedicated to farming.
The next century is going to require careful planning, a lot of automation, and probably robots—lots of robots—to get us over the hump and our numbers down to a manageable level. China is going gangbusters toward automation. So is Japan. Japan and Korea are hitting this problem right now. They are trying to find solutions right now. We should be following them closely, helping them towards a solution, and then adapting their ideas to our own dilemma. We need to find a new way to handle economies—ever-expanding revenue based on a new generation of people is just not going to work.
We’re smart. We can do this. Just like we handled global warming.
Oh. Right.
And, in that vein, the Federal Judicial Center puts together analytical papers to help judges adjudicate complex technical and scientific cases. Republican criticism caused them to pull the entire climate section from their new “Reference Manual on Scientific Evidence.” See here and here.
Oh, and EPA enforcement of environmental laws has pretty much collapsed over the last year.
As an added bonus, RFJ Jr’s top vaccine advisor questions whether we should get polio shots.


