Most adults in our ancestral past lived to be about as old as people do in western industrialized nations today.

That sounds iffy to me. Sure, straight comparison of life expectancy at birth is heavily biased by child mortality. So let's take life expectancy at, say, 25. Are you saying that in "ancestral past" if you made it to 25 you were likely to make it to 70-80? I strongly doubt that, if only for medical reasons. Lack of effective medicine including antibiotics, lack of understanding of public health issues leading to epidemics, parasite load, etc. Plus violence for men and childbirth for women were major risk factors.

According to this if you made it to 15 your average life expectancy was around 54.

http://www.unm.edu/~hkaplan/KaplanHillLancasterHurtado_2000_LHEvolution.pdf

Epidemics and parasite load may have been lower than you might think if the populations were more diffuse. Things spread better through a dense population jammed into a refugee camp than through a sparse population.

Why people want to die

by PhilGoetz 1 min read24th Aug 2015175 comments

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Over and over again, someones says that living for a very long time would be a bad thing, and then some futurist tries to persuade them that their reasoning is faulty.  They tell them that they think that way now, but they'll change their minds when they're older.

The thing is, I don't see that happening.  I live in a small town full of retirees, and those few I've asked about it are waiting for death peacefully.  When I ask them about their ambitions, or things they still want to accomplish, they have none.

Suppose that people mean what they say.  Why do they want to die?

The reason is obvious if you just watch them for a few years.  They have nothing to live for.  They have a great deal of free time, but nothing they really want to do with it.  They like visiting friends and relatives, but only so often.  The women knit.  The men do yardwork.  They both work in their gardens and watch a lot of TV.  This observational sample is much larger than the few people I've asked.

You folks on LessWrong have lots of interests.  You want to understand math, write stories, create start-ups, optimize your lives.

But face it.  You're weird.  And I mean that in a bad way, evolutionarily speaking.  How many of you have kids?

Damn few.  The LessWrong mindset is maladaptive.  It leads to leaving behind fewer offspring.  A well-adapted human cares above all about sex, love, family, and friends, and isn't distracted from those things by an ADD-ish fascination with type theory.  That's why they probably have more sex, love, and friends than you do.

Most people do not have open-ended interests the way LWers do.  If they have a hobby, it's something repetitive like fly-fishing or needlepoint that doesn't provide an endless frontier for discovery.  They marry, they have kids, the kids grow up, they have grandkids, and they're done.  If you ask them what the best thing in their life was, they'll say it was having kids.  If you ask if they'd do it again, they'll laugh and say absolutely not.

We could get into a long argument over the evolution of aging, and whether people would remain eager to have kids if they remained physically young.  Maybe some would.  Some would not, though.  Many young parents are looking forward to the day their kids leave.

A lot of interests in life are passing.  You fall in love with a hobby, you learn it, you do it for a few years, then you get tired of it.  The things that were fascinating when you were six hold no magic for you now.  Pick up a toy soldier and try to play with it.  You can't.  Skateboarding seems awesome for about five years, and then everyone except Tony Hawk gets tired of it.

Having kids might be like that for some people.  Thing is, it's literally the only thing humans have evolved to be interested in.  Once you're tired of that, you're done.  If some of you want to keep going, that's an accidental by-product of evolution.  And there was no evolutionary pressure to exempt it from the common waning of interest with long exposure.

The way to convert deathists isn't to argue with them, but to get them interested in something.  Twist them the way you're twisted.

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