I encourage you to revisit what you know about the club of rome and what was actually published in the Limits to Growth paper. We have been disturbingly on track for a lot of the variables that were of interest back then in the “business as usual” model.
People tend to dismiss anything and everything around resource constraint thinking by doing the quick Ehrlich quip, and never really dig deeper into where people like Ehrlich ever got their ideas to begin with.
What's fascinating is the the Rat Utopia[0] experiment in overpopulation from the late 60's that Dr. John Calhoun ran.
As a result, more than fifty years ago, on tape, Dr. John Calhoun made some eerily accurate[1] extrapolations of where human population is going to be now, and how our TFR (total fertility rate) would collapse (which they basically are, particularly since Millennial & Gen Z generations).
Since nobody pointed that out yet: rat utopia results are questioned now, based not only on a fact that the enclosed space where rats resided were sitting in direct spotlight, but also on a replicability issue.
An experiment with results that couldn't be replicated should be dismissed.
It's entirely possible that the mice in this experiment were overheated, and dominant males didn't fight to "stay in solitude" but rather to be out of direct sunlight.
That's to say, if the cause for such mouseslaughter really was in the temperature, climate change could make original experiment relevant again.
Why would we ever want to revisit people like Erlich and the Club of wrong who were famously extremely off in their predictions? And when some of the writings contributed to forced
The claims that theyll be proven right /on track any day now decades after their predictions failed is hard to take seriously.
It's not the business as usual people who made sure that their predictions fail its people working to either improve the world or sometimes to make money that actually changed things. In fact it was the people who pushed neo malthusian thinking that assumed things would continue as usual and therefore get worse
The conflation of Ehrlich with the LtG team is an extremely dead horse that people should stop beating. The Population Bomb (Ehrlich's 1968 book) was an entirely separate production, with separate teams, separate conclusions, and separate levels of academic rigor.
Furthermore, Ehrlich's PR stunt with Julian Simon of a bet during the peak of a commodity cycle was neither epistemologically sound nor a proof of absolutely anything other than markets do what markets do.
I challenge people who reach for the Ehrlich card whenever these growth conversations come up to reflect on what they're acting on and to recognize that the road of thought on LtG is dark and overwhelming. In fact, it ends at a destination that implies deep unflattering things about our fundamental capabilities as humans and role on this earth. It is natural, and human, to meet this with reactive fear. Keep this in mind as you read what follows.
I mention revisiting Limits to Growth because if you read the introduction[1] you would notice that they state their conclusions as follows:
1. If the present growth trends in world population, industrialization, pollution, food production, and resource depletion continue unchanged, the limits to growth on this planet will be reached sometime within the next one hundred years. The most probable result will be a rather sudden and uncontrollable decline in both population and industrial capacity.
2. It is possible to alter these growth trends and to establish a condition of ecological and economic stability that is sustain able far into the future. The state of global equilibrium could be designed so that the basic material needs of each person on earth are satisfied and each person has an equal opportunity to realize his individual human potential.
3. If the world's people decide to strive for this second outcome rather than the first, the sooner they begin working to attain it, the greater will be their chances of success.
Furthermore, if you look at their 30-year update [2] published in 2002, you can get a few more notable quotes:
"We still see our research as an effort to identify different possible futures. We are not trying to predict the future. We are sketching alternative scenarios for humanity as we move toward 2100." (p. xvii)
and most telling:
"Our most important statements about the likelihood of collapse do not come from blind faith in the curves generated by World3. They result simply from understanding the dynamic patterns of behavior that are produced by three obvious, persistent, and common features of the global system: erodable limits, incessant pursuit of growth, and delays in society’s responses to approaching limits." (p. xviii)
The story Limits To Growth is trying to communicate is still pending and will be until ~2072. Nothing has failed and their nuanced commentary on the complexity of the issue has only aged well.
The scenarios were calculated based on hypothetical 'policies' of a society and the availability of natural resources. The scenario (from the 2004 book) we are tracking most closely is no.2, i.e 'business as usual' but with twice as much resources as was assumed in the 70s.
I don't know the work in question, but the extremes of agriculture we have gone to aren't sustainable simply from a soil destruction standpoint. We may figure that problem out too, but just assuming our ingenuity will get us out of any predicament we create will eventually leave us with a catastrophe. Carefully planning demographics is going to be necessary for stable long term well-being. Doing that in a way that isn't dystopian is a good problem to point our ingenuity at.
People tend to dismiss anything and everything around resource constraint thinking by doing the quick Ehrlich quip, and never really dig deeper into where people like Ehrlich ever got their ideas to begin with.