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 If humans lived 2000 years, progress would be sooo much slower.

We need new generations to step up and take over with their youth and energy.
And if older generations didn't were forced by age to retire, I'm sure they wouldn't allow the new generations to step up.

Death is a society feature, not a bug.

🫂
 
 I don't know what you define progress as, but much of the "progress" we are having now is just perfecting and carrying over breakthrough discoveries in research that have happened in the previous century. Real progress is always slow. What I am saying is: if people didn't have to worry about time and money, a lot more would be doing meaningful things.

By the way the main reason why I am so passionate about Bitcoin is it gives back time to people, because if their savings are not stolen from they don't to worry about money AS MUCH. 
 Ok.
But 20 people living 100 years consecutively are much more productive (in ideas, investigation, passion, creativity, etc.) than just a person living 2000 years.

We need generational change to happen in order to some progress to be established in our societies.

Most people older than 60 years old (i.e.) will never understand Bitcoin proposition if they haven't got it yet.
People don't often change their mind once they're of certain age.

That's what I mean with 'progress': ability to change and evolve. 
 living 2000 years with continued youth and energy doesn't sound too bad 🙂  
 ☺️
But even if possible to still have energy, we don't change our minds easily above certain age.

And the society needs new ways of thinking, disruptive ideas, and those come from new generations...

I think the problem is more about mental 'obsolescence' than physical. 
🫂 
 there's also the overpopulation issue if people don't die and all stay here

Linda Nagata, in her sci-fi books, had one solution for these kind of societal issues that arise from (pseudo-)immortality: if you choose to do the radical life-extending treatment, that's fine, but you're no longer allowed to live on Earth, you'll have to live somewhere else 
 On the contrary, this will fix the population issue. Birth rates are going down. 
 Sorry, but I don't think there's any 'population issue'.
There's nothing wrong if global human population is lower than nowadays. 
 No? Western countries are below the replacement rate. Basically ageing out of existence. But you think there is no problem. 
 Exactly.
🫂 
 it's perfectly normal for ecosystems near carrying capacity to taper off population growth (there's increasingly more conflicts, competition for resources, etc), it means the population number will be stable, not that it will necessarily drop by much 
 Yeah, that could be also another important factor.

But maybe extending the human life would also extend when we have kids, so it doesn't mean birth rate increases necessarily. 
 Great, let's invent antigravity and explore the cosmos 
 now we're talking let's get on it !!! 
 Let Nostr and freedom tech become the home for researching UAP and "fringe" scientific subjects.