6 Comments
User's avatar
Daniel Pareja's avatar

My only remark is that the title made me think of https://en.wikipedia.org/wiki/Probably_(South_Park)

RenOS's avatar

The last part is what gets me about this discussion. In almost every country, there are a handful of ultra-small but also ultra-fertile religious groups with very high retention rates, sometimes 90% and more. I also think that most of them will implode sooner or later, but only a single group has to resist modern culture. It's a fundamentally rigged game.

And as you say, in Israel we can already see it play out in real time. I can't tell you which group will win in any particular country with any confidence, yet it feels like a foregone conclusion that one will. And the group will most likely be FUCKING WEIRD to anyone with average modern sensibilities - at best, if not frightening. Mind you, it doesn't even need to be religious in the traditional sense, it could be some specific subgroup of natalists for example.

Mike W's avatar

Your footnote #2 doesn’t make sense to me. Why carry the data on to such an unrecognizable year if equilibrium is met so much sooner? Showing data from an extrapolation out 3000 years just seems……… Useless? Meaningless?

You also talk about how the data from today won’t be the same data from 100 years from now let alone 1000 years or more. Is there any value in trying to extrapolate between the rates of answers in 2024 to 2024? To try and build a two-point trend line?

James J. Heaney's avatar

The honest answer: because you don't know in advance when the equilibrium will be reached, and running the simulation for 100 generations instead of 40 or whatever guarantees you arrive at it, and it's trivially easy to run. Writing the code takes a bit, but, once written, execution is measured in milliseconds.

Since it's an asymptote, I guess you could argue that, technically, equilibrium is *never* reached, it just slowly approaches its limit to more and more significant figures, but that's dumb, whatever, equilibrium is reached after ~20-30 generations, which I have somewhat haughtily defined as 28-year periods.

> Is there any value in trying to extrapolate between the rates of answers in 2024 to 2024? To try and build a two-point trend line?

How fertility and conversion rates have changed for U.S. adults over the past 10 years is definitely of interest! Eyeballing it, I didn't see any especially obvious trends, but that doesn't mean much.

Mike W's avatar

I guess I’m not surprised the data was ran that far into the future but I ^am^ surprised the initial article’s editors didn’t ask her to truncate the headline down to a meaningful length of time.

James J. Heaney's avatar

Well, if you look at the original article, all she does is report the equilibrium, because she really didn't want anybody confused about the idea that this was a projection into the future. I had no idea how many generations were involved until I opened the code myself.