62
submitted 4 months ago* (last edited 4 months ago) by notsofunnycomment@mander.xyz to c/nostupidquestions@lemmy.world

After watching this video I am left with this question.

The video ultimately claims that humans will not disappear, but doesn't do a great job explaining why.

Correct me if I'm wrong, but for the (or a) population to be and remain stable, the total fertility rate needs to be equal to the global replacement rate (which recently was 2.3).

And since the total average fertility rate appears to be currently at this 2.3, any drop in the fertility rate in place A would have to be compensated with a rise in the fertility rate in place B (assuming that, at some point, we would like to stop population decline)?

I guess one way for a population to remain stable, while women are having fewer than 2.3 children, would be to have fewer men? If a population has 100 women and 10 men, each woman would only have to have on average (a bit more than) 1.1 child? (Which would of course also require a collective form of prenatal sex selection.)

I realize that would be bonkers and unethical. Just wondering out loud.

you are viewing a single comment's thread
view the rest of the comments
[-] Mediocre_Bard@lemmy.world 16 points 4 months ago

If a generation is 25 years, there 7.9 billion people on Earth, and the replacement rate is 1.0, then humans will disappear in about 800 years.

If we enforced a 1.0 replacement rate for two generations, the global population would decrease by 75%, leaving 1.9 billion people in play. This is the global population in 1919. If we go three generations, we could get down to 985ish million prople.

That would be amazing for our climate goals and would be considered ethical and humane by most.

[-] lovely_reader@lemmy.world 11 points 4 months ago

Would the shrinkage in the labor force make it impossible to provide end of life care and financial support as the larger generations age?

[-] Mediocre_Bard@lemmy.world 8 points 4 months ago

Yep. We would have to back to villages at some point.

[-] lovely_reader@lemmy.world 2 points 4 months ago

Would smaller groups feel a reduced strain from that?

[-] Mediocre_Bard@lemmy.world 3 points 4 months ago

Only if they tried to hold to our standard of living. If they adapted, which I suppose that they would, the only stress would be seeing society thin out around you.

[-] yes_this_time@lemmy.world 4 points 4 months ago

Restricting reproductive rights is not ethical.

[-] LordGimp@lemm.ee 7 points 4 months ago

Unlimited reproductive rights is also unethical. Unlimited growth is not sustainable in a finite environment. As masters of our environment, it is our moral responsibility to ensure our existence does not destabilize everything else. We've done so poorly as a species that the world is about to undergo a cataclysmic shift.

[-] yes_this_time@lemmy.world 1 points 4 months ago

Agreed we are not in a good spot and unlimited population is not sustainable. However, sex education, access to birth control, and strong women's rights is the answer in my opinion not 'enforcing' limits - which reads as an authoritarian dystopia to me. Economic growth is good as long as it's decoupled from natural resource use/impact.

[-] daq@lemmy.sdf.org 1 points 4 months ago

What if selection is truly random?

this post was submitted on 26 Jul 2024
62 points (94.3% liked)

No Stupid Questions

35868 readers
292 users here now

No such thing. Ask away!

!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules (interactive)


Rule 1- All posts must be legitimate questions. All post titles must include a question.

All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.



Rule 2- Your question subject cannot be illegal or NSFW material.

Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.



Rule 3- Do not seek mental, medical and professional help here.

Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.



Rule 4- No self promotion or upvote-farming of any kind.

That's it.



Rule 5- No baiting or sealioning or promoting an agenda.

Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.



Rule 6- Regarding META posts and joke questions.

Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.

On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.

If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.



Rule 7- You can't intentionally annoy, mock, or harass other members.

If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.

Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.



Rule 8- All comments should try to stay relevant to their parent content.



Rule 9- Reposts from other platforms are not allowed.

Let everyone have their own content.



Rule 10- Majority of bots aren't allowed to participate here.



Credits

Our breathtaking icon was bestowed upon us by @Cevilia!

The greatest banner of all time: by @TheOneWithTheHair!

founded 1 year ago
MODERATORS