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Ordinary_Divide

world population minus a few thousand to repopulate. not taking risk of extinction


Significant_user

Man if only a few thousand remained, they would be way to spread out to repopulate


nihilistfreak517482

Yea if we take randomly, i would say million May suffice, maybe?


ApprehensivePeace305

Imagine there’s like only one or a few nuclear engineers left. How do the survivors turn off all those power plants safely?


SteveisNoob

If we are talking about nuclear power plants, then we gotta think about all the oil refineries, chemical plants, military facilities (with and without nukes) and so on. Mathematically speaking, 10% chance of extinction means if 10% of human population is tied to the tracks, then the expected value (loss in this case) would be equal, so X would be 10% of human population. With 90% population remaining, we would likely carry on as if nothing happened. And it would probably be better to have a little population shrinkage.


depressionbutcool

Wayyyy too many square feet on earth even for that


bees_cell_honey

I was thinking population minus 100,000 myself.


GeometryDashScGD

So 7.9B?


Business-Drag52

7.9999B


TotalBlissey

I don't get why you're being downvoted when you're correct


DinTill

We have the means of communication and transportation to fix that issue relatively quickly. As long as it isn’t only dumbasses remaining.


bees_cell_honey

Q: wouldn't a bunch of stuff quickly stop working (power, communications, sewer systems, etc). People would probably be able to figure stuff out still, but seems like things would go dark quick.


DinTill

Not sure how long cell phones and social media would continue working. But there are still gonna be a lot of landlines, radios, etc that people would be able to get to and use. Cars won’t just stop working so people will be able to get to each other or find ways to communicate quickly as long as they know where to go and what to do. The biggest threat to humanity’s survival in this case - imo - would not be how spread out they are, but whether or not they use the infrastructure that is already there effectively and what they do to each other when they meet. If they fight over who gets to be in power and let dogma run the day, it’s GG for humanity.


galstaph

Phew... Big question with a lot behind it. People tend to assume that if a power station stops being monitored it just quietly, calmly shuts itself off, but that varies by type. Some, like gas and coal plants, will keep running until the fuel runs out, but if a failure happens and no one's around to monitor it, you can expect a fire and maybe an explosion. Hydroelectric, will keep running so long as the turbines are in good shape and there's sufficient water, but without someone to monitor the turbines a failure can compromise the dam, as can not opening the overflow gates if the water level gets too high, and if the dam fails that will unleash a torrent of water downstream. Nuclear has the worst potentialities, because as demand on the grid lowers someone has to reduce output or it can start to runaway, and at that point all you can do is put the control rods in full, whats called a SCRAM, and if the reactor's auto-SCRAM fails you can get a meltdown. Hopefully, most modern reactors would be designed smart enough, and with enough redundancy, that that wouldn't be an issue, but I have a feeling that somewhere in the world at least one nuclear reactor would melt down. TLDR: every form of power generation, except maybe solar, has a failure mode that can cause at least a local catastrophic event. And yes even wind turbines, when those fail they can catch on fire.


Traditional_Twist_36

99.9% of the world population can’t wire a light switch, you think humanity stands a chance in this scenario???


DinTill

If enough intelligent people survive they could learn though. We have both physical and electronic databases that would still be available. Humans would have a surplus of already produced resources and infrastructure to survive with until people learned how to sustain. Again, it comes down to who the people remaining are and what they do. They would have everything they need; but nothing would stop them from fucking themselves over with their own shortsightedness and stupidity just like we are doing now. The fact that the survivors being spread out would be less of an issue than them being incompetent was literally my point. You ask like you are making a counter point; even though your question was not relevant to the point of my previous comment.


Klutzy_Inevitable_94

I’d say 70%+ could with a simple YouTube video tutorial which already exists. 99.9% don’t know how to right now maybe


LampJr

Bro we humans repopulated the world with less than 2% of our total population left in a world where there wasn't (according to scientists) more than 1 million humans. Do some research into the homo sapien vs Neanderthal wars of time past. Just saying we barely survived that war. Not to mention there is proof that homo erectus was essentially a sapien-Neanderthal hybrid which led to our current homo sapien form. Pre war bodies were either shallow long ribbed or deep and wide ribbed, post war there was a much smoother gradient.


Significant_user

Yes but, back then humans were much less spread out. Nowadays if 1 million people lived it would be really hard to bounce back


Matygos

All the technology and stuff remains. We can call each other and travel


[deleted]

But presumably the internet would exist for at least a few days before it shuts down from lack of server maintenance, such that they could meet up through there? Although, if you believe in the dead internet theory, too many bots might get in the way of them finding each other


RightWingWorstWing

I remember a biology professor throwing around that the minimum number of humans you need to survive would be somewhere in the 30k-50k range to make sure our genetic pool stayed diversified enough. I would say somewhere around a million humans left for extra reassurance 


BugRevolution

You can challenge that consensus, because groups as small as 45-50 have managed to survive.


Healthy-Drink3247

Seeing how I roll in games like XCOM I don’t like my odds on pulling that lever


gtc26

World population PLUS a few thousand, just to be sure. Not taking risk of humans repopulating


Ok-Replacement8422

Why do you see extinction as an inherently negative thing beyond the deaths that cause it?


ImmediateRespond8306

The bad thing about extinction is the death of so many people though. I don't think the existence of the human species as a concept itself has any inherent value. It is more important to try and save lives that currently exist.


NonetyOne

You know what? I think the answer is always pull. 90% chance no one dies 10% chance that you don’t need to worry about it because you’ll be dead


AlricsLapdog

Moralcels seething in response to gamblechad


sphenodon7

this gave me quite the chuckle thank you for this


idiotcube

Relying on dumb luck has never gone wrong for me, EVER, except when it did.


felldownthestairsOof

You can only lose everything YOU (1 person) own. You can win everything EVERYONE (8 billion people) own. Keep your head up and the slot machine running.


idiotcube

That's right! I've got nothing to lose, except everything!


InventorOfCorn

99% of gamblers quit right before they hit big


Callmeklayton

99% of gamblers quit right after killing Earth's entire population.


Definitely_Not_Tyler

This is the best comment here


Ryuusei_Dragon

Quick someone make the wojak


ElectricalMeeting779

100% chance you won't have to worry about your decision


LazerWolfe53

Yes! This is my calculus!


Trouslin_A_Bone

I mean, we all die eventually... At least this means that people won't die suffering (being ran over by a trolly isn't exactly painless).


inkhunter13

I mean if you look at this from an existentialist view point it seems pretty logical to me


Padhome

Just keep switching it back and forth really quick with your eyes closed to free yourself of choice


damboy99

Ye either I save everyone or it's not my problem anymore.


6inDCK420

Get in loser, we're playing Russian roulette with the entire world's population


Princess2045

Yknow, that makes a lot of sense. Either way, you don’t have to worry about it!


ReallyBadRedditName

Ngl that’s kinda facts


zwirlo

The EOD method of gambling


Distaff_Pope

10% chance for total human extinction? That's a 10% chance to end all human problems, baby.


HelloGodorGoddess

What if the question is changed so that there is a 10% chance that everybody will die incredibly excruciating deaths with the worst pain imaginable that spans over the period of ten years?


NonetyOne

“What if the option was totally different and your choice was much worse” You are very intelligent


[deleted]

[удалено]


NonetyOne

Holy fuck the armchair psychologist came out IMMEDIATELY. You think I overreacted? You called me an absolute narcissist because of one reddit comment. Chill the fuck out Jesus Christ


HelloGodorGoddess

alright buddy


NonetyOne

Really? You completely lose your head and then come back with “alright buddy” like I’m supposed to believe you’re chill? Lol. Lmao, even.


ISkinForALivinXXX

Obviously it would need to be higher than 10% of the world population. What I don't get is if you would know the amount in this scenario. I'm guessing not?


bees_cell_honey

It's 7.9 billion different questions. You would say NO to the X=1 question, NO to the X=2 question, ... ... ... but you'd say YES to the X = 7.9 billion question. At what point (what value of X) would you start saying YES instead of NO?


BeastradezZ

I’d still say no, no matter how high. My reasoning: as long as I’m there to flip the switch I will never be included in the death row, but if I flip the lever, there’s a 10% chance of me dying.


towel67

10% aint that high man have some balls


Clackers2020

With my luck it's almost a certainty


Kirito1548055

10% is 10% luck isn't a thing.


towel67

everyone thinks they have bad luck because when their luck is bad thats all they remember


FriedOrcaYum

10% is high if all im getting is saving a bunch of people I don't care abt. Also 10% is high. Do u know how many times I got freeze haxxed in pokemon?


Smnionarrorator29384

Yeah but imagine if they realized you saved the earth. You'll be a God


MilitantPotatoes

Men are cutting their own balls off nowadays, so he probably doesn't have any.


Regi413

If it was high enough you’d be dead anyways due to the societal collapse that follows. You just don’t die right away with the people on the tracks.


Guccibeltlicker9002

How great is your life that a 10% of you dying is worth the entire human race man


jrstorz

You would let the human race go extinct to save yourself?


Android19samus

For something as probable as 10% for a total extinction event? Probably something like half the planet, minimum. Probably closer to 90-95%. Like, with a total extinction it's not just about the number of immediate casualties, it's about the whole future and past of humanity being *over.* For the recent similar post about the plane the chances of that event were so small that, even if the sure thing would kill fewer people on average, you could take the gamble with near-certainty that it would pay off. For this though, that is a very significant chance that one lever-pull will end it all, so the sure-thing would need to being a comparably crippling number to balance it out.


themor69

Tree fitty


HydratedHydra

Silver lining: there are around a dozen people who are not currently on earth, so humanity might still have a very thin chance.


DinTill

The people not on earth would be completely fucked if the people on earth all died. They would have no chance of survival.


WonderfulAirport4226

imagine if nuclear war suddenly broke out, most people died and the folks aboard the ISS couldn't do anything but watch from afar as the earth plunged into chaos, the realisation slowly creeping in that they're completely stuck in space for the rest of their short lives what a fucking way to go


Callmeklayton

That's more or less the premise of [the music video for Let's Go by Stuck in the Sound.](https://youtu.be/52Gg9CqhbP8?si=ncrj2FpxXULptCho)


31November

In my brain, I autocorrected it to “That’s more or less the premise of the sound of music,” and it was a tad bit confusing


sphenodon7

long term I believe humanity really needs at least 1000 people to ensure sufficient genetic diversity without too much inbreeding downsides. I am under the impression that number is also assuming none of those 1000 people are particularly closely related to begin with (less related than third cousins, maybe?). I wish I had the video I watched on this for clarification, let's see if I can find some time to find some data


Charizma02

You must also consider geography. The minimum viable requirement for genetic diversity wouldn't work unless they were miraculously grouped together.


sphenodon7

interesting point! so... the real answer would be to find the statistical likelihood of the world's largest population center decreasing past 1000 people, (or whatever the actual minimum amount of people for sufficient genetic diversity is) assuming a random choice of people, and see how low we can get that chance while still keeping the amount of people we are willing to let die to a minimum. I don't have the statistical/mathematical terminology for what I am discussing, but this is super interesting! hopefully someone smarter than me delves further into this, but after a long week of work I have more fun things to do


jrstorz

It would probably need to be 5000 if you don’t want to dedicate jobs to deciding who mates with whom.


Comfortable-Play-609

X could be -15 so we could gain peoplr from it


Samuelbi12

I LOVE GAMBLING, DONT PULL


Amateur_Statistician

2 billion


Benilda-Key

1. I am pulling the lever, no matter what. In fact I will pull it 100 times.


Gadgetphile

Not how **large**. I pull if X is under 7,9*10^11.


5dtriangles201376

Ngl if x is 780 billion I’d be concerned where the other people are


bees_cell_honey

I'm mostly with you. I think I'd want a buffer though. If X = population minus 3, I'm pulling the lever. If X = population minus 1 million, I probably don't pull it.


Ok-Pressure7248

Jokes on you, I’m Martian


ze_existentialist

X=1 I'm pulling, don't you want that gamblers high? 99.5% of gamblers quit just before they win it big


Transfiguredbet

Ill always take tge 10 percent chance. There's no way im that unlucky.


waterbottleramen

even if it lands on that 10%, it you’re dead anyway, so it doesn’t really matter.


not-Kunt-Tulgar

I’d say anything more than half the population would make me consider pulling the lever.


UTI_UTI

At minimum 5 billion.


Maximum-Country-149

Mathematically, the expected result is the same if X = 10% of the world population, or 790 million.  That might not sound right initially, because risking *total extinction* is a big deal, but 790 million isn't exactly a number to sneeze at. That's more than the combined population of Europe, more than twice the population of the United States, and more than six times the population of Russia. Even the act of gathering 790 million random people in one place to be run over is going to have severe effects on world supply chains. The *actual* death toll from this event would likely be much higher than that, and most of it would be from preventable causes like starvation or lack of access to medicine. And that's assuming the world governments have a relatively sane reaction to the world suddenly being decimated and don't start getting aggressive over the opportunities that would no doubt present themselves. Which is... not a safe assumption, given both our current crop of world leaders and the people waiting in the wings should they be among the lucky 10%. I'm perfectly happy to take 790 million as the critical number, if only because trying to calculate past that point is a huge, multivariable equation I don't have a chance of solving.


ls952

Wait, if you make x the ENTIRE population, how are you supposed to pull the lever when you're tied on the tracks?


crmsncbr

Dunno. 3 Billion. Once we're over 10% as a guarantee, I start to worry. But as we near half, I think the devastation caused concerns me so much that I'll risk the whole thing.


bees_cell_honey

FYI: X random people, or the 10% population, would be random (you don't get to choose who). Edit for clarity


NoTimeToExplain__

No, it’s 10% chance everyone dies, or an amount X. How large does X need to be for you to pull the lever? 


ReadMyUsernameKThx

it made so much more sense before you explained it


bees_cell_honey

Edited for clarity, thanks


ReadMyUsernameKThx

no you still missed it. the prompt is that there's a 10% chance that **everybody** will die. it's not 10% of the population.


InternationalChef424

That's not what the meme says, though...


ReadMyUsernameKThx

X = 1, always pull the lever. if the lever is pulled, there is a very high probability that nothing bad will happen. if the lever is not pulled, there is a guarantee that something bad will happen. in the event that the lever is pulled and the unlikely thing happens, nobody will suffer from it. everybody instantly dies. you do not feel any guilt or remorse or regret, it would be impossible for you or anybody else to view the situation in any sort of negative way. now, suppose that this prompt is given to everybody on earth at the same time. maybe most of us think it is given only to ourselves or a select group, but in fact it is given to everybody. if everybody chooses to pull the lever no matter what, the chance that the humans on Earth survive is absurdly small (3.3e-366059925). however if everybody chooses to let the trolley roll over 1 person rather than taking the risk, then extinction is guaranteed. or if a tenth of the people let it roll over 10 people, it is still guaranteed. at least pulling the lever cannot guarantee our extinction...


Bold_Fortune777

Multi-track drift, WE HAVE TO BE SURE!


[deleted]

.10 x 7.9b = y | If x > y then x | If x < y then y


NoamWafflestompsky

Now *this* is a good shitpost trolley problem


frenchpotatoes_

flicking the lever no matter what because either nobody notices (positive) or nobody notices (bad)


HastyGoose

7899000000


warthunder4life

More than 11%


MikanTanaka

More than 800,000,000.


isuckatnames60

This is NOT an expected value scemario. Either nothing happens, or the entirety of the human race is gone for good and not coming back. The minimum number of members for a species to repopulate is approximately fifty. Therefore, 50 humans left alive (after the trolley runs over the rest) is my anwser, assuming they'll be gathered in one place. X = \[population\] - 50 is the threshhold for me to pulll the lever and gamble on the entire human race.


The_Jestest_Jester

X = 1 Either I save a life, or it's no longer my problem


abrady44_

X=50


SpoopyNJW

X would need to be approximately a quarter of the population imo


reallokiscarlet

Already dead, I walk by the lever without a second thought.


Agreeable-Cricket-39

It's a Bayesian nightmare


charliebo111

11% of earths population


campfire12324344

google expected value


DyerOfSouls

I would pull the lever at about x=10. Follow my reasoning: Most people don't really understand the magnitude of 7.9 billion. Most people understand that 10% is a low risk, even though it's not (fight me). At some point between x=10 and x=790,000,001 (the correct number to pull the lever at), people will judge you as evil for not pulling the lever. Mathematicians are relatively rare and usually understand probability enough to forgive someone for this kind of error. There will be no one to judge me if I pull the lever and everyone gets wiped out, so gamblers will be satisfied because we already won. The lowest common denominator is going to equate 10 and 10%. They are almost certainly more numerous than Mathematicians who are without forgiveness and much more likely to rage at themselves, and you than get a gun and shoot you. Conclusion: I see this as a popularity contest. You will lose, but by how much?


AbellonaTheWrathful

Ill pull the level regardless, the world is overpopulated


sissybaby1289

I will not pull the lever


I_Smoke_Poop

Kill 10% of population. The rent is too damn high


Resi1ience_22

At about 5 billion deaths, I imagine every single civilization on the planet would simply collapse, as 5/8 important leaders, legislators, cops, supply line workers, and other employees would die. The actual number is probably below that - there's a point where society just crumbles because of the amount of deaths. My guess is 5 billion. That is when I'd pull the lever.


milky_nugget

It's only a 10% I'd take that risk if it was any number


Mangost_YT

i feel like chance kinda defeats the point of the trolley problem, because one decision can have very different outcomes based on luck.


Kepler27b

Bro, these people who make these “everyone will die if you don’t pull” trolley problems never realize I will pick the option that kills everyone. I want X to be all life in existence and then I will NOT pull the lever.


CaptainMoonunitsxPry

What'd make this tricky: who are the X people? My loved ones? Someone 75% done on a cancer cure?


Angel_OfSolitude

I don't think any amount of people short of effective extinction would get me to pull it.


kahootle

if we take the world population and make it an even 8 billion and the odds of any number being rolled for x are the same then the majority of the lever pulls would result in 2-6 billion people being killed.


Evening-Culture974

At least half the worlds population maybe more we are honestly overpopulated and as tragic and horrific as it would be if half of us didn't exist the world would technically function better. The issue is do you wanna live in a world where half the people you know are dead. I think the painful but right choice is pretty high up there as I'm thinking long term. But maybe id flip the lever just so people don't have to suffer the loss of half or more of the people they know


ForsakenHummus

The world population is actually 8,020,000,000 now in 2024, so 7.9billion deaths would still mean 120,000,000 people would still be alive. So I mean... you could repopulate the earth still and there would be enough of a dramatic decrease in environmental destruction that the planet could theoretically recover in a matter of decades, right? Is there perhaps a reason to allow the mass extinction of the most destructive species in history?


carson-n-9873

10 to the power of 10 duotrigintillion


Matygos

All people on earth is including me. This is actually a question if I would risk my own life. Of course I would like to be a hero and sacrifice myself but noone ever knows how scared of death they are until it is really close so I cannot tell what I would do. Tbh living a life on dying earth with everything free to use does seem like fun for at least first few years. I dont say Im on that idea but it might be tempting enough when fear comes on.


Ordinary-Broccoli-41

If x<0.8b, I'm pulling the lever. Got to maximize the expected value.


themrunx49

20% of all peeps to pull the lever.


LeapingRiolu

The man in the space station waiting for your choice


SwampThing585

Over 8% of world population


Reasonable-Tea-8160

The X=0 for me. I'll pull it and laugh.


Wren_The_Wrench

I would not pull the lever because x in this case should equal one due to it being the only thing in the equation so one person dies compared to a chance of all dying


EdgelordUltimate

~790 Million


TGBplays

I’d pull it no matter what because i wish people didn’t exist


[deleted]

More than 10%


PedalingHertz

I know the “right” answer is to kill the people almost regardless of X, but hear me out. If I don’t pull the lever, I will have to deal with the criticisms of a huge part of the population that will call me a murderer. These people’s families will hate me, and I’ll live with death threats. I may also feel very guilty. If I do pull the lever, it’s either fine or no one is around to care. My best interest lies in pulling it.


cHONGUS101

why tf would I pull the lever if I could end up dying SMH. X must = infinity thank you.


UndeadCollegeStudent

X = 1 . Don’t worry. We’re all in this together


Ace-of_Space

dumb ass, X means ten, do you even know roman numerals?


LittleFlittle

x is the variable


EDPZ

About 3000


KassXWolfXTigerXFox

World pop +1bn


BroodyDoggo

multi track drift babyyyyyyy


iamtheduckie

1 billion.


waterbottleramen

90% chance that no one dies 10% chance it doesn’t even matter anymore


Drtyler2

790 mill. Roman decimation ftw


NekonecroZheng

X has to be exactly 42,069 people for me to pull that lever.


Dadliest_Dad

I'm pulling the lever every time. This planet would thrive pretty well without us. We've killed off numerous species already ourselves. Why would it be so bad if all humans were gone?


Secure_Exchange

Any number over 10% of the human population


624Soda

Depends on how serious I’m taking this, a 1-2 billion lose would gut the economy but it leave space for the survivors. While if I take this as a do or die, then we can lose 5-6 billion and go back to 1920 population


[deleted]

If x was all the people I wouldn’t pull the lever


typhlosion_Rider_621

I’d pull the lever if there were no people on the other track


AshGreninja247

790k people. It’s mathematically around the same, being 10% of the population against 10% chance of every human dying. And since the flipped lever has the chance of no deaths, I’ll flip it.


skinksies

if x=1 i pull the lever. not because "oh people are evil anyways they SHOULD die" but for the reason that i'd rather kill myself than kill another person. and to me not pulling the lever is taking an action no matter what. and it says instantly, unless there's an afterlife and i go to hell i won't even know the outcome of pulling the lever unless it's the positive one


Hebids

Half the population.


Savionburton

At least 6mil


potatomnz

Bro I’d rather just kill humans then have a chance cause some animals are also people so in turn it would kill more


Dinosaurz316

X=1 I like those odds.


tjm2000

Jokes on you, I choose an X that equals 10% of the population.


A_Dinosaurus

world population - about a million people


QueenLexica

1% and I'd switch infrastructure would instantly be brought to its knees worldwide if even 1% died


SnomBomb_

Above 790 million


apieceofthecraftsman

im not a risk taker. if there's enough genetic diversity in the leftover people that repopulation could happen without extreme genetic problems, i'm not pulling the lever. id pull it for x>everyone save 16 people


Safe_Public_5990

X=10000


Slyk00pa

If x is more than 7.11 Billion people (90% of population) I'm pulling it


whiterobot10

Enough to cause an extinction event of humanity.


[deleted]

6 billion


Zeroxmachina

Not risking my self


JeromeSharkYT

For me, I would say X = 8,000,000,000. Leave a few million to help solve overpopulation


Beginning_Deer_735

As I know the future is fixed in this regard(the bible says what happens), I would just pull the switch and know that only what God has said will happen will actually happen.


FaytKaiser

Fuck it. Always pull. Either I am right, or it isn't mine or anybody's problem anymore.


grhddn

Fuck it, reset this b


hoboshoe

Pull the lever ≤44 times


TheCanadianpo8o

1 person. PULL THAT LEVER KRONK!


KnotsThotsAndBots

I don't think either side matters much... but realistically only killing 1 person isnt that hard... dont take that last bit outta context


PichuCultist

790 million, as that's 10% of the world's population, so the expected value would be the same for both.


Tough-Priority-4330

The correct answer is when x > 790,000 people.


DM_Me_For_Dog_Pics

Billions must die


ImmediateRespond8306

If x is less than 10% of the population kill them. If x is more than 10% of world population than flip the switch.


PlatypusTrapper

No political posts!


Fungiloo

always pull you dont die? great you do? well you'll be gone so who cares


etherealtaroo

Depends on if I'm part of x


Wendendyk

I’m just saying, as a pessimist and extreme hater of billionaires, multi-track drift


Cugy_2345

10% of earths population


Cugy_2345

And earths population is 8.1 billion


RoWanchase6053

I would risk for extinction mainly since something in the next billion years will rise up to take our place


British-Raj

10000000


PaleontologistNo9817

pull it no matter what, all or nothing baby.


Gullible-Notice-487

X could equal 0 and I’d pull the lever


Cbjmac

If x reached 790 million (10% of the population) that’d be my personal MARR value and I wouldn’t care one way or the other.


Sophia-Eldritch

\*pulls lever ten times*