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Time travel

The way our population is falling in the advanced countries you may not have to go very far into the future.
I don't see any evidence of falling population in the US. I just keep seeing woods burned down for housing developments and shopping malls and constantly increasing traffic. I guess the eastern US never got the memo about falling population
 
The US has 79 million baby Boomers half of which will pass in the next 12 or so years is their a plan in place to replace them?
Here in Canada we have planned for this hence our very high current immigration.
 
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The swelling numbers have to be coming from somewhere. i haven't seen the whole US inch by inch. But I have traveled through every state from Florida to Nevada, and Florida to Pennsylvania in 2023.  Everywhere I saw new subdivisions, shopping areas, and roads being built or widened. Nor have I seen advertisements asking people to consider moving to this or that state.
 
I'm smack in the middle of the baby boomer bell curve by the time I hit 83 years of age half of my cohort will have passed away.
 
I checked around
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Here are my statistics four point one million baby boomers will pass away in the next thirteen years, why we are bringing five hundred thousand immigrants a year in.
 

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Death rate is part of the equation. If birth rate exceeds death rate population grows. The population growth rate by country chart shows Canada with a 1.1% growth rate, and the US with .6% growth rate. In the US, only the northeast region has declined, and only by 43,330. The other regions more than makes up for the northeast. The growth rate has declined in recent years, but that just means the population isn't increasing as fast. But it is still increasing
 
With each years us baby boomers are dying I'm in the middle of the cohort birthday in January 1945 to 1965 by the time people my age turn 83 half of us will be dead. we are already seeing shortages in labour as we retire 6 more years and all of us will be retired. my youngest brother 10 years younger birthday December will be one of the last to retire. In another a good chunk of the rock stars from the sixties will have passed so only covers of their songs will be available.
 
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my youngest brother 10 years younger birthday December will be one of the last to retire. In another a good chunk of the rock stars from the sixties will have passed so only covers of their songs will be available.
Covers, and the millions of copies of their existing recordings.
 
Just like masters of old like Mozart and Beethoven. We watched our older generation pass over the years aunts and uncles first one or two then it picks up speed lose one every few weeks the oldest baby boomers are just turning 80 this year expect to see a celebrity boomer's passing the next three years as they turn 83.
 
That's the one thing that bothers me what type of coordinate system would be needed for time and distance. Riemannian geometry worked great for Einstein. As far as I can make out both time and gravity are emergent. Most physicists are unaware Maxwell did his major paper that was the big breakthrough was done using octonions. Can this be used in some manner as a coordinate system. Maybe p-adic numbers can be used in some way.
 
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Just "landing" on the planet would be a major issue: the earth is never at the same place twice. The solar system orbits the galaxy at a speed of 230 km/s.

Realistically, a fairly good spacecraft would be needed, and it might need to be very fast.

Even if you were carried along with the earth, if the original relative motion was conserved, you'd probably arrive moving quite fast. The tangential speed at the equator is over 1500 km/hr. The Poles are safe though :)

If course the TARDIS isn't constrained by such things, and it's full of convenient tech for a comfortable and (potentially) safe life as a time traveler.

BTW: regarding the population sub-topic:
Population is constrained by the number of women in the right age bracket (about a 20-year range per individual if modern norms are applied).
The effects are already kicking in all over the "Western world". The first overt sign isn't housing starts (it has a 25(ish)-year lag, and is directly affected by immigration). It's schools and nurseries closing.

The USA is one of the few "Western countries" that can avoid the number issue easily via immigration. But there just one small problem ....
The culture may change uncomfortably quickly.

To sustain the population, the ideal immigrant will be one that's likely to grow their numbers (since it's already too late to get the largest "group" to do this). If immigrants are limited to avoid that, more adults will be needed, so the same factors are at work, but faster.

Almost everyone here under 45-50 will get to see how this works out for themselves. Whatever happens, it will be obvious within 10 years.
 
The issue with women reproducing is not age its when they hit menopause, then reproduction stops the millenials will notice this within the next five years, going to be a big issue. the oldest of this cohort just turned 44. ThIs is something immigration cannot easily fix The ideal immigrants are educated and if the women miss their child bearing window and prioritize schooling over immigrating they could miss boat.
 
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In terms of serious numbers, the reproduction cap is 38-40. There are outliers of course, but their effect isn't significant. Ditto frozen eggs.

Immigration is interesting. A country would prefer e.g. 30-ish engineers, experienced technicians etc, preferably with a 50/50 M/F split,
What you get when it's all illegal or semi-legal is a very high proportion of "military-age" men, because you need to be tough to handle the journey. Which is part of the reason immigration is associated with gangs /lol.

The US can (in principle) pick and choose, so directly useful immigrants with the right demographics are possible. Too bad for their countries of origin, but that's how it works. And there's no shortage of younger people (both sexes) who'd like to be trained as technicians and/or perform semi-skilled work.

Housing and work will open up of course, so after some early chaos it shouldn't be hard for the US to achieve a balance. And the US has plenty of space for housing if it's actually needed. Modern housing pressure occurs in cities,, so reuse won't be as simple as it sounds. It's not going well in Japan.

Less attractive countries are going to have serious problems though. More attractive countries will grab all the most useful people from less attractive ones.
The demographic effect (who has to stay, who is able to leave) will be very interesting :)
 
Immigration is interesting. A country would prefer e.g. 30-ish engineers, experienced technicians etc, preferably with a 50/50 M/F split,
That's pretty much how it works here. You can't just decide to live in Australia and move here. If you don't have skills that are in high demand then you're not welcome. Likewise if you're over 44 years old, you can't come here as a permanent resident.

We do have a fairly large intake of refugees considering our population size, and that also affects the intake limit on migration.

Part of the equation is also our ability to keep increasing infrastructure to cater for the growing population, and now we're finding issues with water supply, Australia is the driest continent on the planet. Our population has grown by 10% in just the last 5 years and that's putting a lot of pressure on services so migration's a hot topic here at the moment.

There's also a long term issue that most people never think about. Cities always start near rivers where there's rich farming land but as the cities grow that land gets used for housing. More people equals less ability to grow food. Currently Australia supplies food for 180 million people, but for every 1 million people we add to our population there's 3 million less people that we can feed.
 
Every body talks about how fast us boomers are retiring, no mention of how fast we are dying. Educated and semi skilled south americans are going to clammer to go to Mexico, in the next few years same language similar culture.
Here in Canada we have water land and most recently weather. I currently see developers buying all my neighbours houses and renting them the current trend is higher density quadplexes on smaller lots a lot of immigrants come from countries where higher density is the norm. My friend who lives in a town I own property in complained he could not snowmobile last winter too warm.
 
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