5 ms·

Do the dead outnumber the living?

59 points by soitgoes 15y ago

maeon3 15y ago
Given the average lifespan of a human on earth today (around 67), and the average population growth rate (somewhere between 1 and 2%), it causes an acceleration in the number of humans living and being born. The notion that this growth is unsustainable is scare mongering. 1.5% growth per year is sustainable indefinitely to colonize the galaxy, if we can just keep the resources needed to support that growth flowing. At some point we will need to create a Dyson sphere around the sun to capture most of its energy, and harvest the raw materials in the asteroid belt between mars and Jupiter. As for living space, it will be superstructures orbiting the sun in the habitable zone.
- Retric 15y ago
  The speed of light is finite. So, if we where to cover 200 light year radius we would need to expand Pi(200+r)^2 = 1.015 Pi * 200^2 = 1.5 light years in a single year which can't happen. Put, another way 1.015^10,000 = ~10^64 but there are only ~500 billion stars in our galaxy and that's spread over 100,000 light years. PS: The milky way only weighs ~4×10^41 kg humanity weighs ~1/2 trillion kg. So at 1.5% growth it takes less than 5,000 years for the projected mass of humanity 10^44kg to be 1,000 times as large as the mass of the milky way.
  - benl 15y ago
    This is my favourite proposed solution to the Fermi Paradox. I first came across it in Steven Baxter's novel Space -- he explores a few proposed solutions and the speed-of-light-limit-to-growth explanation is the most intriguing.
  - lmkg 15y ago
    Put another way: the volume of space we can reach in time t is O(t^3), while the population is O(e^t). Therefore, there is a value of t for which we will overpopulate our light-sphere.
- kennu 15y ago
  I guess that means at some point the growing number of people born on Earth will have to be shipped to space. I hope there are enough volunteers and space ships. Meanwhile, I'd also keep in mind this curve, posted earlier on HN: http://en.wikipedia.org/wiki/File:World_population_growth_rate_1950%E2%80%932050.svg http://en.wikipedia.org/wiki/File:World_population_growth_ra...
- deleted 15y ago
  [deleted]
- brazzy 15y ago
  > The notion that this growth is unsustainable is scare mongering. No. It's stating a very basic and obvious fact to anyone who understands math. > 1.5% growth per year is sustainable indefinitely to colonize the galaxy, if we can just keep the resources needed to support that growth flowing. Exponential growth - you don't understand what it means. Dyson spheres are chickenshit when you're trying to sustain exponential growth indefinitely in a three-dimensional universe.
- jakeonthemove 15y ago
  I guess people just can't comprehend the sheer size of the Earth and the massive amount of resources it still has. Just check this graph out: http://www.landartgenerator.org/blagi/archives/127 http://www.landartgenerator.org/blagi/archives/127 That's the surface area we need to power EVERYTHING with solar power (which is VERY ineffective at the moment). Add to that wind power (lower in the article), and we're golden for another hundred years. We don't even need to go to other solar systems (which seems impossible at the moment) - just start colonizing and mining the nearby planets/asteroid field (it's very very hard, but not impossible). Nuclear submarines are a good example of relatively self-sufficient bases/colonies. With time, it's possible to slooowly build something like that in space...
  - politician 15y ago
    Ya know, with a handful of thorium we wouldn't have to lose all of that shoreline to wind generators...
    - jakeonthemove 15y ago
      For sure, I imagine if the technology develops fast enough, the territory needed to generate all of the power we need would be much smaller...
- drcube 15y ago
  >The notion that this growth is unsustainable is scare mongering. Exponential growth makes this statement as wrong as it can be. It may be scaremongering to say it is unsustainable in the short term, but eventually that growth will have to stop, either due to voluntary decision-making on the part of humans everywhere, or due to a scarcity of resources. Or in fact both, given that the scarcity of resources will cause people to decide on reproducing less. Growth in general is simply not sustainable in the long term. Isaac Asimov once estimated that at "today's" rate of growth (circa 1970), Earth would become a ball of human flesh expanding at the speed of light by 5000AD. Of course its a ridiculous prediction, but it illustrates that between now and then, something must change. Look at this chart: http://en.wikibooks.org/wiki/File:2nd_Order_Damping_Ratios.svg http://en.wikibooks.org/wiki/File:2nd_Order_Damping_Ratios.s... Assuming 1 here refers to the maximum "sustainable" population, we'll either oscillate around it, overshoot and come back, or asymptotically approach zero percent growth. There is no such thing as a system with no feedback, which is allowed to grow without bound. It may seem like there are no constraints currently, but they're out there, and eventually we'll hit them.
  - a-priori 15y ago
    The world population is not experiencing exponential growth. It's experiencing logistical growth (i.e, following a logistical function rather than an exponential function). We've just been seeing the first half of the curve, which does approximate exponential growth. But we're starting to see it turn around. In the most developed countries, fertility has dropped to replacement or lower. As the remaining countries develop, their fertility rates are also dropping. It's reasonable to extrapolate from this that at some point in the future, the global fertility rate will be at or below replacement. The constraints are microeconomic. It's expensive to raise children, especially when you factor in opportunity costs (this part is key to why world population won't stabilize at starvation levels). When you give people birth control, people seem to make a rational economic decision about how many children to have. That provides the feedback mechanism you mentioned.
    - beloch 15y ago
      The developing world has birth control but, in large parts of it (e.g. most of africa), most people aren't using it. This is for economic reasons. In these economies children are your pension fund. There's no RRSP funds or old age security payments. Just children who (hopefully) look after you in your old age. If you have only one or two you will either be an unreasonable burden upon them or simply be abandoned to starve. The economic support system for seniors in the developed world is currently under a lot of strain too. In countries where pension funds are funded from current taxes the baby-boomer retirement is going to be a tremendous drain on society. The baby-boomer generation should have tucked away a nice huge fund to pay them in retirement as well as support the greater demand on the medical system. Instead, they racked up huge amounts of public debt. Massive amounts of immigration and raising the retirement age have been the stop-gap measure of choice so far, but the developed world's support for senior citizens could easily revert to that of the developing world's without much warning! So, yes, children are expensive, but for most of history and in large parts of the world today they are a necessary investment for retirement. In only the developed world of the past century have financial pressures favored fewer children, and that could easily change.
- pedrolll 15y ago
  I can't tell if you're joking or not. Dyson spheres, space mining, superstructures... Currently we have sent a handful of people to a rock orbiting this planet, then gave that up because it was uninteresting. At the moment there is no incentive to send anyone to space because machines can do better that little bit of exploring that is currently being done. I'd be surprised if in a hundred years there's enough resources or motivation to do any space exploration. To me it seems far more likely that we have spent our fortunes on earthly matters such as wars and the like.
  - mike-cardwell 15y ago
    A hundred years ago we'd only just managed to get airborne... If we look at the technological advances of the past hundred years, I think you're being pessimistic.
    - mechanical_fish 15y ago
      One wonders if this argument will ever get old. It was being used in exactly this form forty years ago, when aviation (not to mention rocketry) had - perhaps unbenownst to most people at the time - essentially reached the state that it would remain in for the next fifty years, at least. [1] But after forty years on the plateau, it still gets trotted out. My hypothesis is that this argument will die with the baby boomers, who have a living memory of the day when 2001 really felt like a documentary beamed back from the future, but I could be wrong. --- [1] We had supersonic passenger aircraft and moon rockets in 1972. Then we gave them up, on purpose: They didn't pay their own way. And I don't want to minimize the hard work of aviation engineers since then: Better avionics, better navigation systems, computerized scheduling, pilotless drones, fly-by-wire... But these are refinements, not fundamental breakthroughs in travel technology.
      - Retric 15y ago
        Sending people to the moon was an incredibly expensive process that gained us nothing. If we are going to spend significant resources on colonizing space it must either be economically viable or at worst a small net cost that can be reasonably subsidized for the long term. So while we are not there yet, there has been fundamental progress on 5 significant technology's for actually developing space since 1972. Step 1: LEO Scram Jet's which can dramatically increase payload to orbit. http://en.wikipedia.org/wiki/Scramjet http://en.wikipedia.org/wiki/Scramjet Carbon Nano-tubes, which is the first material that could enable a realistic space tether. http://en.wikipedia.org/wiki/Carbon_nanotube http://en.wikipedia.org/wiki/Carbon_nanotube http://en.wikipedia.org/wiki/Tether_propulsion http://en.wikipedia.org/wiki/Tether_propulsion Step 2: After LEO Ion Thrusters http://en.wikipedia.org/wiki/Ion_thruster http://en.wikipedia.org/wiki/Ion_thruster which when coupled with high efficiency solar panels enables better delta V than chemical rockets. And makes mining the asteroid belt a reasonable possibility. Solar Sail's which could enable realistic travel to nearby stars by probes or robots to build infrastructure. http://en.wikipedia.org/wiki/Solar_sail http://en.wikipedia.org/wiki/Solar_sail The delta V on slowing down is a major issue if you want to do more than a simple fly by which makes Solar Sail's the best non nuclear option for colonization. Step 3: Power Fission makes living in space between stars viable. The power requirements for a colonizing the ort cloud and then moving further to the next star(s) only work when you can acquire ridiculous amounts of power, store it for long periods of time, and then tap it on demand. Of the 5 fusion is both the most important and the furthest from fruition but it's still on the path to viability in the next 100 years.
- mapster 15y ago
  "The notion that this growth is unsustainable is scare mongering" AND "if we can just keep the resources needed to support that growth flowing." Sustainability relies on the current technology, natural cycles, and resources (i.e., natural limits). There is no IF.
  - tomjen3 15y ago
    Sustainability relies on _future_ tech. If we need to know if we can feed 20% more people in 10 years we need to know if we can produce 20% more food in ten years, using what technology is available then. Not what is available today. And we (and this is what people who keep saying we can't support all those people never take into account) _can count on the extra minds of those 20% to do their uttermost to solve the situation_. That is what people never take into account.
    - jakeonthemove 15y ago
      Meanwhile, farming and food production is one of the least profitable industries to be in... Trust me, when the need comes, there will be a way. Obviously, the situation is different in poor countries - but just take a look at all the expired food we dump from supermarkets, restaurants, offices and homes - it sure is more than enough to feed a lot of those who are starving... if only we had teleporters...
    - mapster 15y ago
      future tech is not taken into consideration when defining something as currently sustainable. It currently is or it is not sustainable, not "it is sustainable due to inevitable future tech developments".
- mahmud 15y ago
  I hope not. Why do you wish for a galactic infestation of humans? Much more attainable is population control here.
  - jakeonthemove 15y ago
    Are you kidding? "Set sail and conquer" is our motto, without a challenge we'll die out even without population control :-)
- DasIch 15y ago
  These solutions are also very expensive. Given the fact that the population growth is at its highest in less developed countries, I think it is a lot more realistic to assume that the population will be "controlled" by killing those least able to defend themselves. The ethical problems are easily circumvented if you do it indirectly through distribution of resources.
- rayiner 15y ago
  > The notion that this growth is unsustainable is scare mongering. The notion is more predicated on the absence of science fiction technology.
abcd_f 15y ago
> Do the dead outnumber the living? Yes, by a factor of 15 or so (from the article).
pak 15y ago
"Out of all the people that ever were, almost all of them are dead. There are way more dead people. ... You're just dead people that didn't die yet." It's a bit from a Louis CK routine, and the numbers appear to back him up.
beloch 15y ago
There is considerable debate over when the first Homo sapiens sapiens appeared, but the consensus is that it was much longer ago than 50 000 years. 200 000 would be considered a fairly conservative number these days. This obviously skews the math a little.
- malay 15y ago
  200,000 years ago is the approximate consensus for the arrival of Homo sapien; however the commonly held belief is that behavioral modernity occurred approximately 50,000 years ago. Most of that doesn't really end up mattering because the last 10,000 years (marked at the origin of agriculture, 8000 BCE in the BBC table) have contributed disproportionately to the 107B figure. An extra 150,000 years at a baseline 1M population wouldn't throw the figure off more than 10-15%.
adam_freidin 15y ago
1. read article 2. * dead baby joke * 3. ... 4. Profit?
malay 15y ago
I always find this statistic about the number of people who ever lived to be incredible. It means that 6.5% of everyone who ever lived is alive right now. For me, that fact helps explain the incredible pace of change observable in every facet of civilization. There is an awesome amount of our humanity's intelligence on display at this very moment. Then, when you consider how a lot of the 6.5% live (i.e. with extreme poverty and hunger), we are not even remotely reaching our collective capacity. The pace is going to get even faster as we achieve the Millenium Development Goals.
- tomjen3 15y ago
  What really blows my mind about it has always been that there are properly more people alive today who can read Sumerian Cuneiform than there have ever been -- including back when there was something called Sumeria and they were using Cuneiform.
  - nitrogen 15y ago
    OT grammar question: I've noticed some comments from various posters use "properly" where I would have used "probably." Is this an alternate use of the word "properly" of which I have heretofore been unaware?
    - smilliken 15y ago
      I believe grand-parent was using the term "properly" like it is used in math, i.e. "strictly greater than".
alok-g 15y ago
They used to tell children that people turn into stars when they die. Isn't it interesting then that the number of dead people is of the same order as the number of stars in a galaxy! :-)

59 points by soitgoes 15y ago

Given the average lifespan of a human on earth today (around 67), and the average population growth rate (somewhere between 1 and 2%), it causes an acceleration in the number of humans living and being born. The notion that this growth is unsustainable is scare mongering. 1.5% growth per year is sustainable indefinitely to colonize the galaxy, if we can just keep the resources needed to support that growth flowing. At some point we will need to create a Dyson sphere around the sun to capture most of its energy, and harvest the raw materials in the asteroid belt between mars and Jupiter. As for living space, it will be superstructures orbiting the sun in the habitable zone.

Retric 15y ago
The speed of light is finite. So, if we where to cover 200 light year radius we would need to expand Pi(200+r)^2 = 1.015 Pi * 200^2 = 1.5 light years in a single year which can't happen. Put, another way 1.015^10,000 = ~10^64 but there are only ~500 billion stars in our galaxy and that's spread over 100,000 light years. PS: The milky way only weighs ~4×10^41 kg humanity weighs ~1/2 trillion kg. So at 1.5% growth it takes less than 5,000 years for the projected mass of humanity 10^44kg to be 1,000 times as large as the mass of the milky way.
- benl 15y ago
  This is my favourite proposed solution to the Fermi Paradox. I first came across it in Steven Baxter's novel Space -- he explores a few proposed solutions and the speed-of-light-limit-to-growth explanation is the most intriguing.
- lmkg 15y ago
  Put another way: the volume of space we can reach in time t is O(t^3), while the population is O(e^t). Therefore, there is a value of t for which we will overpopulate our light-sphere.
kennu 15y ago
I guess that means at some point the growing number of people born on Earth will have to be shipped to space. I hope there are enough volunteers and space ships. Meanwhile, I'd also keep in mind this curve, posted earlier on HN: http://en.wikipedia.org/wiki/File:World_population_growth_rate_1950%E2%80%932050.svg http://en.wikipedia.org/wiki/File:World_population_growth_ra...
deleted 15y ago
[deleted]
brazzy 15y ago
> The notion that this growth is unsustainable is scare mongering. No. It's stating a very basic and obvious fact to anyone who understands math. > 1.5% growth per year is sustainable indefinitely to colonize the galaxy, if we can just keep the resources needed to support that growth flowing. Exponential growth - you don't understand what it means. Dyson spheres are chickenshit when you're trying to sustain exponential growth indefinitely in a three-dimensional universe.
jakeonthemove 15y ago
I guess people just can't comprehend the sheer size of the Earth and the massive amount of resources it still has. Just check this graph out: http://www.landartgenerator.org/blagi/archives/127 http://www.landartgenerator.org/blagi/archives/127 That's the surface area we need to power EVERYTHING with solar power (which is VERY ineffective at the moment). Add to that wind power (lower in the article), and we're golden for another hundred years. We don't even need to go to other solar systems (which seems impossible at the moment) - just start colonizing and mining the nearby planets/asteroid field (it's very very hard, but not impossible). Nuclear submarines are a good example of relatively self-sufficient bases/colonies. With time, it's possible to slooowly build something like that in space...
- politician 15y ago
  Ya know, with a handful of thorium we wouldn't have to lose all of that shoreline to wind generators...
  - jakeonthemove 15y ago
    For sure, I imagine if the technology develops fast enough, the territory needed to generate all of the power we need would be much smaller...
drcube 15y ago
>The notion that this growth is unsustainable is scare mongering. Exponential growth makes this statement as wrong as it can be. It may be scaremongering to say it is unsustainable in the short term, but eventually that growth will have to stop, either due to voluntary decision-making on the part of humans everywhere, or due to a scarcity of resources. Or in fact both, given that the scarcity of resources will cause people to decide on reproducing less. Growth in general is simply not sustainable in the long term. Isaac Asimov once estimated that at "today's" rate of growth (circa 1970), Earth would become a ball of human flesh expanding at the speed of light by 5000AD. Of course its a ridiculous prediction, but it illustrates that between now and then, something must change. Look at this chart: http://en.wikibooks.org/wiki/File:2nd_Order_Damping_Ratios.svg http://en.wikibooks.org/wiki/File:2nd_Order_Damping_Ratios.s... Assuming 1 here refers to the maximum "sustainable" population, we'll either oscillate around it, overshoot and come back, or asymptotically approach zero percent growth. There is no such thing as a system with no feedback, which is allowed to grow without bound. It may seem like there are no constraints currently, but they're out there, and eventually we'll hit them.
- a-priori 15y ago
  The world population is not experiencing exponential growth. It's experiencing logistical growth (i.e, following a logistical function rather than an exponential function). We've just been seeing the first half of the curve, which does approximate exponential growth. But we're starting to see it turn around. In the most developed countries, fertility has dropped to replacement or lower. As the remaining countries develop, their fertility rates are also dropping. It's reasonable to extrapolate from this that at some point in the future, the global fertility rate will be at or below replacement. The constraints are microeconomic. It's expensive to raise children, especially when you factor in opportunity costs (this part is key to why world population won't stabilize at starvation levels). When you give people birth control, people seem to make a rational economic decision about how many children to have. That provides the feedback mechanism you mentioned.
  - beloch 15y ago
    The developing world has birth control but, in large parts of it (e.g. most of africa), most people aren't using it. This is for economic reasons. In these economies children are your pension fund. There's no RRSP funds or old age security payments. Just children who (hopefully) look after you in your old age. If you have only one or two you will either be an unreasonable burden upon them or simply be abandoned to starve. The economic support system for seniors in the developed world is currently under a lot of strain too. In countries where pension funds are funded from current taxes the baby-boomer retirement is going to be a tremendous drain on society. The baby-boomer generation should have tucked away a nice huge fund to pay them in retirement as well as support the greater demand on the medical system. Instead, they racked up huge amounts of public debt. Massive amounts of immigration and raising the retirement age have been the stop-gap measure of choice so far, but the developed world's support for senior citizens could easily revert to that of the developing world's without much warning! So, yes, children are expensive, but for most of history and in large parts of the world today they are a necessary investment for retirement. In only the developed world of the past century have financial pressures favored fewer children, and that could easily change.
pedrolll 15y ago
I can't tell if you're joking or not. Dyson spheres, space mining, superstructures... Currently we have sent a handful of people to a rock orbiting this planet, then gave that up because it was uninteresting. At the moment there is no incentive to send anyone to space because machines can do better that little bit of exploring that is currently being done. I'd be surprised if in a hundred years there's enough resources or motivation to do any space exploration. To me it seems far more likely that we have spent our fortunes on earthly matters such as wars and the like.
- mike-cardwell 15y ago
  A hundred years ago we'd only just managed to get airborne... If we look at the technological advances of the past hundred years, I think you're being pessimistic.
  - mechanical_fish 15y ago
    One wonders if this argument will ever get old. It was being used in exactly this form forty years ago, when aviation (not to mention rocketry) had - perhaps unbenownst to most people at the time - essentially reached the state that it would remain in for the next fifty years, at least. [1] But after forty years on the plateau, it still gets trotted out. My hypothesis is that this argument will die with the baby boomers, who have a living memory of the day when 2001 really felt like a documentary beamed back from the future, but I could be wrong. --- [1] We had supersonic passenger aircraft and moon rockets in 1972. Then we gave them up, on purpose: They didn't pay their own way. And I don't want to minimize the hard work of aviation engineers since then: Better avionics, better navigation systems, computerized scheduling, pilotless drones, fly-by-wire... But these are refinements, not fundamental breakthroughs in travel technology.
    - Retric 15y ago
      Sending people to the moon was an incredibly expensive process that gained us nothing. If we are going to spend significant resources on colonizing space it must either be economically viable or at worst a small net cost that can be reasonably subsidized for the long term. So while we are not there yet, there has been fundamental progress on 5 significant technology's for actually developing space since 1972. Step 1: LEO Scram Jet's which can dramatically increase payload to orbit. http://en.wikipedia.org/wiki/Scramjet http://en.wikipedia.org/wiki/Scramjet Carbon Nano-tubes, which is the first material that could enable a realistic space tether. http://en.wikipedia.org/wiki/Carbon_nanotube http://en.wikipedia.org/wiki/Carbon_nanotube http://en.wikipedia.org/wiki/Tether_propulsion http://en.wikipedia.org/wiki/Tether_propulsion Step 2: After LEO Ion Thrusters http://en.wikipedia.org/wiki/Ion_thruster http://en.wikipedia.org/wiki/Ion_thruster which when coupled with high efficiency solar panels enables better delta V than chemical rockets. And makes mining the asteroid belt a reasonable possibility. Solar Sail's which could enable realistic travel to nearby stars by probes or robots to build infrastructure. http://en.wikipedia.org/wiki/Solar_sail http://en.wikipedia.org/wiki/Solar_sail The delta V on slowing down is a major issue if you want to do more than a simple fly by which makes Solar Sail's the best non nuclear option for colonization. Step 3: Power Fission makes living in space between stars viable. The power requirements for a colonizing the ort cloud and then moving further to the next star(s) only work when you can acquire ridiculous amounts of power, store it for long periods of time, and then tap it on demand. Of the 5 fusion is both the most important and the furthest from fruition but it's still on the path to viability in the next 100 years.
mapster 15y ago
"The notion that this growth is unsustainable is scare mongering" AND "if we can just keep the resources needed to support that growth flowing." Sustainability relies on the current technology, natural cycles, and resources (i.e., natural limits). There is no IF.
- tomjen3 15y ago
  Sustainability relies on _future_ tech. If we need to know if we can feed 20% more people in 10 years we need to know if we can produce 20% more food in ten years, using what technology is available then. Not what is available today. And we (and this is what people who keep saying we can't support all those people never take into account) _can count on the extra minds of those 20% to do their uttermost to solve the situation_. That is what people never take into account.
  - jakeonthemove 15y ago
    Meanwhile, farming and food production is one of the least profitable industries to be in... Trust me, when the need comes, there will be a way. Obviously, the situation is different in poor countries - but just take a look at all the expired food we dump from supermarkets, restaurants, offices and homes - it sure is more than enough to feed a lot of those who are starving... if only we had teleporters...
  - mapster 15y ago
    future tech is not taken into consideration when defining something as currently sustainable. It currently is or it is not sustainable, not "it is sustainable due to inevitable future tech developments".
mahmud 15y ago
I hope not. Why do you wish for a galactic infestation of humans? Much more attainable is population control here.
- jakeonthemove 15y ago
  Are you kidding? "Set sail and conquer" is our motto, without a challenge we'll die out even without population control :-)
DasIch 15y ago
These solutions are also very expensive. Given the fact that the population growth is at its highest in less developed countries, I think it is a lot more realistic to assume that the population will be "controlled" by killing those least able to defend themselves. The ethical problems are easily circumvented if you do it indirectly through distribution of resources.
rayiner 15y ago
> The notion that this growth is unsustainable is scare mongering. The notion is more predicated on the absence of science fiction technology.

abcd_f 15y ago

> Do the dead outnumber the living? Yes, by a factor of 15 or so (from the article).

pak 15y ago

"Out of all the people that ever were, almost all of them are dead. There are way more dead people. ... You're just dead people that didn't die yet." It's a bit from a Louis CK routine, and the numbers appear to back him up.

beloch 15y ago

There is considerable debate over when the first Homo sapiens sapiens appeared, but the consensus is that it was much longer ago than 50 000 years. 200 000 would be considered a fairly conservative number these days. This obviously skews the math a little.

malay 15y ago
200,000 years ago is the approximate consensus for the arrival of Homo sapien; however the commonly held belief is that behavioral modernity occurred approximately 50,000 years ago. Most of that doesn't really end up mattering because the last 10,000 years (marked at the origin of agriculture, 8000 BCE in the BBC table) have contributed disproportionately to the 107B figure. An extra 150,000 years at a baseline 1M population wouldn't throw the figure off more than 10-15%.

adam_freidin 15y ago

1. read article 2. * dead baby joke * 3. ... 4. Profit?

malay 15y ago

I always find this statistic about the number of people who ever lived to be incredible. It means that 6.5% of everyone who ever lived is alive right now. For me, that fact helps explain the incredible pace of change observable in every facet of civilization. There is an awesome amount of our humanity's intelligence on display at this very moment. Then, when you consider how a lot of the 6.5% live (i.e. with extreme poverty and hunger), we are not even remotely reaching our collective capacity. The pace is going to get even faster as we achieve the Millenium Development Goals.

tomjen3 15y ago
What really blows my mind about it has always been that there are properly more people alive today who can read Sumerian Cuneiform than there have ever been -- including back when there was something called Sumeria and they were using Cuneiform.
- nitrogen 15y ago
  OT grammar question: I've noticed some comments from various posters use "properly" where I would have used "probably." Is this an alternate use of the word "properly" of which I have heretofore been unaware?
  - smilliken 15y ago
    I believe grand-parent was using the term "properly" like it is used in math, i.e. "strictly greater than".

alok-g 15y ago

They used to tell children that people turn into stars when they die. Isn't it interesting then that the number of dead people is of the same order as the number of stars in a galaxy! :-)