The selection effects of this transition will be really fascinating to see after the fact. The species has spent a long time under selection pressure for "having more kids", but is being subjected for the first time to "having more kids while extreme prosperity and modern telecommunications exist" which is a very different thing.
Animats · 24m ago
The future is probably a society with more robots than humans.
We can see this happening now at Amazon.
Amazon is a good case to watch, because their operations replace humans with robots on close to a one to one basis.
Right now, Amazon has about 1.5 million human employees, and 1 million robots.
Amazon reached peak humans in 2022, with around 1.6 million employees. Then human employees began to decline slightly. Robots continue to increase. Here's an old chart from 2017, when Amazon had increased all the way to 45,000 robots and some people were worried.[1] Now, it's 20x that.
How a society of mostly robots will work is not clear, but it's coming anyway.
The point on p. 39 about immigration is important for everyone to understand:
> Most immigrants worsen the fiscal position of the government.
According to an Economist article addressing data collected by Denmark, each non-western immigrants produce a negative financial benefit over their lifetimes, and immigrants from the Middle East, North Africa, Pakistan, are a net cost on the government at every age: https://inquisitivebird.xyz/p/the-effects-of-immigration-in-...
Arainach · 4m ago
Over what timespan? This analysis isn't elaborated at all. Does it count the impact of companies being able to pay lower wages and paying more taxes? Does it account for the future generations? Etc.
lynx97 · 9m ago
Intuitvely, those opposing immigration have always known this. But tell that t someone from the left They will verbally kill you for stating obvious facts.
TrackerFF · 20m ago
Ironic as it may sound, coming from a childfree millennial, I'm kind of puzzled how the system will survive. Both my grandparents died in their 90s, and spent over 30 years are retirees - mainly living off their state pension.
As people become older, they'll either have to work longer, or the system will come crashing down. Especially with lower fertility rates. My generation should be birthing kids as the previous ones, but I think almost half of my peers are childfree, too. And we're in the age that we have maybe - if lucky - 6,7 more years to reproduce.
I can't imagine a population where 1/3 will be retired people. It is also a huge drain on the healthcare system.
otabdeveloper4 · 16m ago
> can't imagine a population where 1/3 will be retired people.
We're currently trending towards a birth rate of 1 or less.
This means 4/5 will be retirees in three generations.
Your 1/3 figure is wildly optimistic. Little chance it will be that good.
bArray · 44m ago
> Don’t we care about output per capita?
Not "yes and no", the answer is simply yes. You cannot simply flood your country with unrestricted migration from lower GDP per capita countries and not expect overall growth to slow down.
> Yes, output per capita is the primary measure of individual welfare but...
> our ability to service debt and social security obligations depends on total output.
Our ability to service social obligations and debt entirely depends on GDP per capita. Whilst they are both paid on a GDP basis, they a generated as a multiplier of capita. If you have 1 million people, and add another million people (of the same distribution), social obligations are also doubled, as will debt, but both delayed. It's not that complicated.
> We live in a welfare state, and this is unlikely to change anytime soon.
It's about to change now, the time is up. Governments world wide are now struggling to issue bonds at reasonable rates, there are no known mechanisms to unwind. The likes of Japan, a large buyer of the foreign bond market, starting to bring down its bond purchases, indicates this.
> Most immigrants worsen the fiscal position of the government.
This is especially true whilst you have a system already setup making a loss, such as the UK's pension system.
> Each immigrant into a rich country makes the position of poor countries harder.
Every doctor, nurse, engineer, etc, that we import is one less for their original country. What do we think that does to the original country on scale? What do we think that does to their growth?
> Affordable housing:
Many animals will not breed, and some even miscarry, if they are not in a suitable environment. Giving birth and raising children makes the mother/family very vulnerable. It seems that for all of our sophistication, the human race is no different. What we're measuring world wide appears to be an enormous economic deficit.
No comments yet
baron816 · 44m ago
The mid-century Baby Boom occurred after a surge in affordable home keeping technologies (vacuum cleaners, washing machines, refrigerators, etc). I think a rebound in fertility will have to come from technology. Specifically, robots to help with child care and new fertility treatments to allow women to have children later in their lives.
ch4s3 · 20m ago
The mid-century Baby Boom came after WWII, and probably had very little to do with technology. The upswing started some time in late 1944 to mid 1945 as combat was winding down in Europe and a lot of young men were returning home. Otherwise fertility has been declining steadily since 1800 in western countries.
lynx97 · 12m ago
Late child birth is not about fertility but about risks for the child. The only woman I know (yeah, anecdotes) who attempted to delay getting a child until after her 40th birthday got a baby with down syndrome. I know what living with a disability in our world means, from personal experience. And given that experience, I have a hard time giving these women some slack. I think they are risking the well being of their children just for their own selfish reasons. We are humans, and there are limits to what we can do. We need to accept them, or we will make other people suffer.
seydor · 40m ago
if we have all those robots doing everything for us, why do we need children?
giantg2 · 36m ago
Little mention of automation in the labor discussion. Also, no real discussion of the consumerism aspect of the economy when talking about worker productivity.
Depopulation shouldn't be a big deal when it's decades away and will be a slow decline.
This trend doesn't bode well for the long term survival of the social welfare state.
rwyinuse · 1h ago
That depends very much on how technology progresses during coming decades. If we get something like AGI, then having less working age people may be a good thing, because there will be much, much less demand for white collar workers at least.
In the mid 2000's when I was a kid, at school I was taught that there would be a HUGE labour shortage once certain large generations retire, as younger generations are much smaller. Guess what, they retired a decade ago, and yet my country has the second highest unemployment rate in EU, with a very weak job market for fresh graduates in particular. Increased efficiency & automation ate all those jobs, nobody was hired to replace many of the boomers who retired. I doubt the future will be any different.
seydor · 14m ago
societies and states have been doing fine without welfare for centuries
Social welfare state will still exist, it'll just be more costly as drag than it is today (in the US, ~$1.1T/year of uncompensated caregiving occurs, for example). Capitalism is more the challenge, it's built on squeezing the aggregate working age population for profits, and that cohort is in terminal decline over the long term. Between global sovereign debt load [1] and the demand for future profits (slides 31-33 of this PDF), there will be sadness as the future has less and less humans to saddle these economic burdens on. Such are the breaks when you predicate a socioeconomic system on never ending growth, and growth is over because humans globally (for various complex and interwoven issues) are choosing to have less children or no children.
The complaining about fertility rates, mostly done by the chunk of the population hoarding more and more of the wealth, will continue until people's ability to afford rent and children improves.
lurk2 · 45m ago
> will continue until people's ability to afford rent and children improves.
National fertility rates don’t correlate with any measure of average income. The only thing that does is the average number of years a woman spends being educated; this probably isn’t causal because the decline in fertility occurs across all income and education levels.
vonneumannstan · 58m ago
This totally ignores the fact that the decline in fertility is measurable across the globe in the poorest and wealthiest nations in the world. It's clearly not a simple matter of affordability...
Rent is the bigger issue than affordability per se. My wife pointed out the other day that we had our second and third kids shortly after we stopped living in apartments and bought a house. We didn't plan to have a significant age gap between our first (who we had in law school) and our other kids, and we earned a lot of money the whole time, it just happened that way. She's convinced that having the extra space subconsciously encouraged us to have more kids.
nobodywillobsrv · 46m ago
While I generally agree with this and am angry at "the elites" who seem to both want increased fertility but also don't really target it in their companies ... I think the bigger unspoken issue is really the TFR skew. Global fertility can go down for a while and it isn't disastrous. TFR skew results in large problems if the least progressive and poorest groups systematically have much higher TFR over extended periods.
None of the solutions I can think of are very appealing or even tolerable. It really feels like it's a matter of carrying on and having hope. But perhaps we could start by merely describing the data and the situation.
vixen99 · 54m ago
'hoarding more and more of the wealth'. Sounds very much like you believe in the pie fallacy. A zero sum game? Maybe that's not what you meant though.
Arainach · 13m ago
The pie has nothing to do with it.
The tide is rising and most ships are sinking. Productivity in the last 40 years has skyrocketed. The gains have overwhelmingly gone to a tiny minority while everyone else has seen rent, food, education, and more go up dramatically faster than wages. This has accelerated in the last 15 years and has destroyed any faith in the social contract.
cyberax · 53m ago
The drop in fertility rate is directly liked to migration into dense cities. They are just not a good place to have children.
The US resisted the fertility drop for much longer, because of higher suburban population.
toomuchtodo · 40m ago
> The US resisted the fertility drop for much longer, because of higher suburban population.
It was immigration, but next generation of all immigrants (native born) adopts host country total fertility rate in this context.
The thing that collapses in a negative population growth environment is passive earnings from interest and asset appreciation, retirement, and to some extent social welfare states. The whole idea of things like social security is predicated on a growing population paying for the elderly. It's also very, very bearish for things like real estate long term. We are probably still in a real estate bubble.
I suppose I've never expected to ever be able to retire unless I get truly wealthy. It's not something I've ever included in my life plan because I've kinda seen the writing on the wall about this since I was in my twenties.
I don't think this crash in fertility is that unexpected, and it's not even all bad. It'll help us weather things like climate change and natural resource depletion.
toomuchtodo · 1h ago
Social security is solvent for at least the next 75 years if the US removes the payroll cap on contributions from wage income. We choose not to. The economic resources exist for these social programs, it will just diminish profits (the horror /s). It's a policy choice.
Every year total fertility rate remains lower than replacement rate further locks in the fertility curve, but there is no political will or desire to implement the fixes required. So, we keep kicking the can until we cannot anymore. It's unfortunate. Demographic destiny comes regardless, as each year total fertility rate continues to fall.
By 2075, Medicare and Social Security will reach a over 14% of GDP combined, up from around 8% today. To pay that, we'll have to raise taxes by $1.75 trillion using today's GDP figures. That will require just about doubling payroll taxes from the present level.
That's probably an underestimate. As population shrinks, GDP will shrink as well, unless we have large gains in productivity, which have stalled. It's not clear to me that the projections about SS/Medicare as a percentage of GDP account for the effect of GDP shrinking due to population decline. CBO assumes a stable population through 2060, using quite arbitrary assumptions about immigration: https://www.cbo.gov/publication/60875.
toomuchtodo · 36m ago
I agree with your observations. The future will not be as bright as the past, the population boom was already squeezed for the gains. Immigration at the levels needed to change this are unpalatable to most electorates, and with total fertility rate dropping across the world, it's important to be mindful that net migration to Earth is 0 (slide 39). As the economic future deteriorates due to the ever increasing drag of these obligations, I'd expect total fertility rate to continue to decline at present rates (if not slightly accelerate). This creates a self reinforcing feedback loop. A "Demographic Doom Loop" [1].
The welfare state has to collapse before people realize children are their retirement plan, and that there’s no guarantee the government will take care of them in old age.
toomuchtodo · 17m ago
There is no guarantee your children will take care of you. Walk through any nursing or care home and speak with residents, ask the last time a child saw them.
> There is no guarantee your children will take care of you
On the flip side, for those childless, it's completely guaranted none will.
> One quarter of adult children estranged from a parent
That sounds like a 75% success rate.
api · 1h ago
Paul Ehrlich was almost exactly wrong about everything, but he continues to frame the discourse to a ridiculous degree. I'm not sure what the magic pixie dust is that allows people to be this wrong and still have credibility.
FredPret · 22m ago
The modern-day Malthus, except so much worse, because he had the example of Malthus but chose to ignore the lesson there
profstasiak · 1h ago
how is Paul Ehrlich linked to the original post?
what is he wrong about?
UncleMeat · 1h ago
Paul Ehrlich was the most visible figure in the midcentury fear of overpopulation. He claimed that by now we'd have seen starvation so profound around the world (100,000,000s dead of starvation) that large portions of the third world would collapse completely and that the only mechanism to prevent this starvation was extreme population control measures placed by the west on the rest of the world (including things like partitioning India and just letting some regions starve completely to death with no aid). He believed that the sustainable population for the planet was one billion.
He was completely wrong. I think it is a great example to use in these modern discussions. Just 50 years ago we were seeing highly influential people say "we are going to breed ourselves to death and the only solution is extreme curtailing of rights." Today, we are starting to see highly influential people say "we are going to not-breed ourselves to death and the only solution is extreme curtailing of rights."
Animats · 39m ago
India got there on overpopulation. Total fertility rate around 6 in 1965. India does not have enough water for its population.[1] China would have hit similar problems if not for their one-child policy. China managed to avoid the overshoot when medicine starts to work but the economy hasn't developed yet. India didn't.
If you have access to the sea and to uranium you can make all the freshwater you need, even recycle your own wastewater nearly infinitely.
This is a technological and economic problem, not an overpopulation problem.
api · 1h ago
Unfortunately a lot of people are now saying we need extreme curtailing of rights -- largely womens' rights -- because of underpopulation. The answer to every panic is always curtailing of rights. Scary thing may happen therefore we need big alpha ape to fix it for us by bashing people on head with big rock. Grunt, grunt.
UncleMeat · 55m ago
Right this is what I am saying. And I think that we should be outrageously skeptical of such people and oppose them with fervor. In the 70s people were saying that we needed to commit brutal oppression against a large portion of the world based on geography in order to prevent future catastrophe. These people were wrong in every possible dimension and has we listened to them we would have committed a world-historic evil.
Similarly, we are starting to see people say that we need to commit brutal oppression against a large portion of the world (this time based on gender) in order to prevent future catastrophe. I suspect that these people will be wrong in every possible dimension and that if we listen to them that we will be committing a world-historic evil.
lurk2 · 40m ago
> In the 70s people were saying that we needed to commit brutal oppression against a large portion of the world based on geography in order to prevent future catastrophe.
What is this referring to?
rendang · 15m ago
Which people are saying we need to curtail womens' rights because of underpopulation?
jmclnx · 56m ago
This is all well and good, but population dropping will only impact our civilization a little. I think this is an issue only because the "very rich" may actually see their standard of living fall. For the poor, it will have no real impact.
Plus it is probably a good thing population will start dropping.
The much larger worry should be Climate Change, a dropping population can only help Climate Change in the long run. But right now, due to how we all live, we are heading into a whole lot of hurt due to Climate Change. Far more "hurt" than the population falling.
Also, worried about population dropping ? Wait to see how fast it drops when Countries start massive wars due to dwindling resources.
EDIT: want an example of the Impact of population dripping ? Look at Europe during the Plague in the 1300s(?). What happened was the rich had a hard time finding labor, so they had to start paying people a lot more for their work. To me, that is the big fear, the rich may have to start paying more.
Qem · 14m ago
> For the poor, it will have no real impact.
It will likely bring back the problem of old age destitution as rule, not exception. It's a previously common scourge that never went completely away[1][2], but went into the sidelines by early-mid XX century, and is set to coming back with a vengeance, by the time current people in their 20s-30s reach old age. It hits the poor hard.
We can see this happening now at Amazon. Amazon is a good case to watch, because their operations replace humans with robots on close to a one to one basis. Right now, Amazon has about 1.5 million human employees, and 1 million robots. Amazon reached peak humans in 2022, with around 1.6 million employees. Then human employees began to decline slightly. Robots continue to increase. Here's an old chart from 2017, when Amazon had increased all the way to 45,000 robots and some people were worried.[1] Now, it's 20x that.
How a society of mostly robots will work is not clear, but it's coming anyway.
[1] https://www.statista.com/chart/7428/45000-robots-form-part-o...
> Most immigrants worsen the fiscal position of the government.
According to an Economist article addressing data collected by Denmark, each non-western immigrants produce a negative financial benefit over their lifetimes, and immigrants from the Middle East, North Africa, Pakistan, are a net cost on the government at every age: https://inquisitivebird.xyz/p/the-effects-of-immigration-in-...
As people become older, they'll either have to work longer, or the system will come crashing down. Especially with lower fertility rates. My generation should be birthing kids as the previous ones, but I think almost half of my peers are childfree, too. And we're in the age that we have maybe - if lucky - 6,7 more years to reproduce.
I can't imagine a population where 1/3 will be retired people. It is also a huge drain on the healthcare system.
We're currently trending towards a birth rate of 1 or less. This means 4/5 will be retirees in three generations.
Your 1/3 figure is wildly optimistic. Little chance it will be that good.
Not "yes and no", the answer is simply yes. You cannot simply flood your country with unrestricted migration from lower GDP per capita countries and not expect overall growth to slow down.
> Yes, output per capita is the primary measure of individual welfare but...
> our ability to service debt and social security obligations depends on total output.
Our ability to service social obligations and debt entirely depends on GDP per capita. Whilst they are both paid on a GDP basis, they a generated as a multiplier of capita. If you have 1 million people, and add another million people (of the same distribution), social obligations are also doubled, as will debt, but both delayed. It's not that complicated.
> We live in a welfare state, and this is unlikely to change anytime soon.
It's about to change now, the time is up. Governments world wide are now struggling to issue bonds at reasonable rates, there are no known mechanisms to unwind. The likes of Japan, a large buyer of the foreign bond market, starting to bring down its bond purchases, indicates this.
> Most immigrants worsen the fiscal position of the government.
This is especially true whilst you have a system already setup making a loss, such as the UK's pension system.
> Each immigrant into a rich country makes the position of poor countries harder.
Every doctor, nurse, engineer, etc, that we import is one less for their original country. What do we think that does to the original country on scale? What do we think that does to their growth?
> Affordable housing:
Many animals will not breed, and some even miscarry, if they are not in a suitable environment. Giving birth and raising children makes the mother/family very vulnerable. It seems that for all of our sophistication, the human race is no different. What we're measuring world wide appears to be an enormous economic deficit.
No comments yet
Depopulation shouldn't be a big deal when it's decades away and will be a slow decline.
Recorded talk for the slides in this post.
In the mid 2000's when I was a kid, at school I was taught that there would be a HUGE labour shortage once certain large generations retire, as younger generations are much smaller. Guess what, they retired a decade ago, and yet my country has the second highest unemployment rate in EU, with a very weak job market for fresh graduates in particular. Increased efficiency & automation ate all those jobs, nobody was hired to replace many of the boomers who retired. I doubt the future will be any different.
[1] https://unctad.org/publication/world-of-debt ("Global public debt surpasses $100 trillion in 2024.")
National fertility rates don’t correlate with any measure of average income. The only thing that does is the average number of years a woman spends being educated; this probably isn’t causal because the decline in fertility occurs across all income and education levels.
None of the solutions I can think of are very appealing or even tolerable. It really feels like it's a matter of carrying on and having hope. But perhaps we could start by merely describing the data and the situation.
The tide is rising and most ships are sinking. Productivity in the last 40 years has skyrocketed. The gains have overwhelmingly gone to a tiny minority while everyone else has seen rent, food, education, and more go up dramatically faster than wages. This has accelerated in the last 15 years and has destroyed any faith in the social contract.
The US resisted the fertility drop for much longer, because of higher suburban population.
It was immigration, but next generation of all immigrants (native born) adopts host country total fertility rate in this context.
https://www.pewresearch.org/short-reads/2019/08/08/hispanic-...
https://www.pewresearch.org/short-reads/2016/10/26/5-facts-a...
https://www.pewresearch.org/wp-content/uploads/2019/08/FT_19... visually nails this.
Now, would these people have had a higher birth rate if they remained in their LATAM countries? The data indicates no.
Latin America’s Baby Bust Is Arriving Early - https://www.bloomberg.com/opinion/articles/2025-05-22/latin-... | https://archive.today/EPMAU - May 22nd, 2025
I suppose I've never expected to ever be able to retire unless I get truly wealthy. It's not something I've ever included in my life plan because I've kinda seen the writing on the wall about this since I was in my twenties.
I don't think this crash in fertility is that unexpected, and it's not even all bad. It'll help us weather things like climate change and natural resource depletion.
Every year total fertility rate remains lower than replacement rate further locks in the fertility curve, but there is no political will or desire to implement the fixes required. So, we keep kicking the can until we cannot anymore. It's unfortunate. Demographic destiny comes regardless, as each year total fertility rate continues to fall.
https://usafacts.org/articles/how-much-does-the-us-spend-on-...
https://www.pgpf.org/article/social-security-reform-options-...
That's probably an underestimate. As population shrinks, GDP will shrink as well, unless we have large gains in productivity, which have stalled. It's not clear to me that the projections about SS/Medicare as a percentage of GDP account for the effect of GDP shrinking due to population decline. CBO assumes a stable population through 2060, using quite arbitrary assumptions about immigration: https://www.cbo.gov/publication/60875.
Happiness is reality minus expectations.
[1] https://x.com/KenRoth/status/1753526235173450213 | https://archive.today/rY4WG
One quarter of adult children estranged from a parent - https://thehill.com/blogs/blog-briefing-room/4104138-one-qua... - July 19th, 2023
On the flip side, for those childless, it's completely guaranted none will.
> One quarter of adult children estranged from a parent
That sounds like a 75% success rate.
what is he wrong about?
He was completely wrong. I think it is a great example to use in these modern discussions. Just 50 years ago we were seeing highly influential people say "we are going to breed ourselves to death and the only solution is extreme curtailing of rights." Today, we are starting to see highly influential people say "we are going to not-breed ourselves to death and the only solution is extreme curtailing of rights."
[1] https://en.wikipedia.org/wiki/Water_scarcity_in_India
This is a technological and economic problem, not an overpopulation problem.
Similarly, we are starting to see people say that we need to commit brutal oppression against a large portion of the world (this time based on gender) in order to prevent future catastrophe. I suspect that these people will be wrong in every possible dimension and that if we listen to them that we will be committing a world-historic evil.
What is this referring to?
Plus it is probably a good thing population will start dropping.
The much larger worry should be Climate Change, a dropping population can only help Climate Change in the long run. But right now, due to how we all live, we are heading into a whole lot of hurt due to Climate Change. Far more "hurt" than the population falling.
Also, worried about population dropping ? Wait to see how fast it drops when Countries start massive wars due to dwindling resources.
EDIT: want an example of the Impact of population dripping ? Look at Europe during the Plague in the 1300s(?). What happened was the rich had a hard time finding labor, so they had to start paying people a lot more for their work. To me, that is the big fear, the rich may have to start paying more.
It will likely bring back the problem of old age destitution as rule, not exception. It's a previously common scourge that never went completely away[1][2], but went into the sidelines by early-mid XX century, and is set to coming back with a vengeance, by the time current people in their 20s-30s reach old age. It hits the poor hard.
[1] https://www.marketwatch.com/story/successful-educated-but-no...
[2] https://citizenmatters.in/mumbai-abandoned-destitute-elderly...