Linked Questions

4
votes
3answers
1k views

How many people does it take to run a self sufficient colony [duplicate]

How many people would it take to to run a self sufficient colony? I'd say it would take from 20-1,000,000 to live comfortably and still be a colony. But I want to know if it's possible with less than ...
0
votes
1answer
2k views

What is the minimum number of people you need to have a diverse enough gene pool to last about 2 centuries? [duplicate]

Other questions have looked into founding successful colonies, meaning healthy populations that thrive indefinitely. However, many stories concern a colony that is discovered some specific (and ...
2
votes
1answer
633 views

On a generation ship, How many different families would you have to have to prevent inbreeding [duplicate]

Outfitting an generation ship. How many unrelated people would you have to have in order to have a big enough genetic pool for mating to prevent inbreeding?
2
votes
3answers
273 views

If a major disaster wiped out most of humanity, how many survivors would there need to be in order for them to rebuild? [duplicate]

I have a story set about five thousand years after a major disaster reduced the world population from billions down to... well, that's the question. How low could it have gone, and still provide the ...
2
votes
0answers
163 views

What is the minimum viable population to avoid genetic decay? [duplicate]

There are a couple of other questions that get CLOSE to this one, but mine is much more basic. The other estimates are for colony size or country size, and these take into account technology, ...
2
votes
0answers
94 views

How many people would it take to colonize Mars? [duplicate]

To ensure a self-sufficient colony, there would need to be enough people to ensure a diverse gene pool, a wide variety of technical experience, and enough bodies to work farms and such. How many ...
107
votes
16answers
14k views

How many humans can I abduct without getting noticed?

Humans as Pets is now a thing. But not for AI (as in the linked question) but for the aliens. This celebrity was seen with their human pet and now every alien kid is begging their parent to get one ...
45
votes
13answers
14k views

Could humanity survive if all except a few males died in a plague?

Tomorrow, a sudden airborne plague comes around that kills nearly all human males - women are unaffected. The UN and different nations try their hardest but fail to find a cure. There are riots and ...
24
votes
10answers
12k views

Could human civilization live 150 years in a nuclear-powered aircraft carrier colony without resorting to mass killing/ cannibalism?

An un-treatable virus starts infecting and killing people. Societies are on the brink of collapse, and it is decided the best way to save the most amount of people is to move everyone who can fit into ...
39
votes
10answers
56k views

How many people are required for a healthy re-population of the Earth (Post-Apocalypse)?

In my particular Earth, much has remained after the human-killing virus, and nature is thriving - even taking over the cities. It's beautiful. But I have separated the healthy populace in orbit ...
11
votes
12answers
4k views

How plausible is a system of clans of pure-blood wizards?

In this medieval world, I want to set up a clan system that builds up every kingdom. Every kingdoms will have at least 3-4 big clans/families, each is unique to the theme of the magic they use. For ...
24
votes
6answers
3k views

How many people need to be born every 8 years to sustain population?

So I'm doing some worldbuilding for a small, isolated village on the coast. The winters are harsh, but making sure everybody has enough food generally isn't an issue because they have good trade with ...
14
votes
5answers
4k views

Colonizing a planet: how much food would we need to bring?

Assuming that the planet is 20 light years away (so back and forth trips would be impractical) we have no clue whether there is any edible life forms on the new planet hibernation (freezing/thawing ...
25
votes
7answers
6k views

What is the minimum size of a self-sufficient industrial country?

Imagine there is a country in which there are all important natural resources (oil, gas, metal ores, wood, etc.) in their natural form and which lies in a temperate climate region. There may be some ...
9
votes
7answers
4k views

What is a reasonable amount of population growth for 900 years?

Starting with about 500 humans and allowing for 900 years to pass, about how many people would there be at the end? (Just asking for a rough estimate, maybe a range.) Assuming: People are generally ...
15
votes
3answers
1k views

Repopulating humans AND zombies

So most zombie apocalypse stories involve wiping out 99.9% of the human race and having a small minority survive to try and keep living. But, let's say I want society as we know it to collapse, but I ...
6
votes
3answers
3k views

How small can a population be with regard to genetic diversity?

I'm working on creating a species that favours small families for a number of reasons, and have no interest in 'breeding as much as possible'. As a consequence, their population size is small. But how ...
3
votes
6answers
635 views

Ratio of passengers to cargo on colony flights

Sci-fi scenario with flights to a colony planet. Tech level is otherwise close to today (e.g. no androids or desktop nanofactories). Planet is quite similar to Earth, so e.g. agriculture works, you ...
6
votes
7answers
959 views

What is a realistic growth rate for a space colony?

I am starting a theorycrafting thread in a video game forum. It deals with the creation of a Hegemony created by the descendants of a colony ship that was cut off from returning to Earth (wormhole ...
5
votes
6answers
238 views

How long might it take a new planetary colony to achieve technological parity with their starting civilization?

So, given the following assumptions and starting criteria: The colony ship comes from a human culture that is about 100 years advanced from the present. The amount of initial colonists are around 5,...
5
votes
6answers
198 views

Does a large population make sense in a galactic society with automation tech?

So I am writing a Sci-Fi novel where humans are currently spread out over 440 Star systems ( ~ 2000 Light years). There has been several breakthroughs in Automation technology and all manual labor ...
8
votes
3answers
644 views

Planetary Colonisation; how to retain ethno-racial appearances over millennia?

I was reading this question last night about people of colour in fantasy stories. I've read so many fantasy stories where any mention of colour is associated with the negative/animalistic/barbaric ...
3
votes
5answers
285 views

Would having more than two sexes decrease the number of individuals required to have a sustainable population from a genetic perspective?

On a world made up of many small islands, each island cannot support a very large population. Although sometimes individuals from one island make it across the ocean to another, this is usually a ...
3
votes
5answers
548 views

What would society be like if the world was populated by a chosen set of clones?

It's 100 years in the future, and we've decided to end all war and crime. How do we plan to accomplish this? Through rigorous study of personality theory and human interaction, we've identified 50 ...
4
votes
3answers
370 views

When traveling to an alternate Earth, how many generations would you have to breed with the natives to prevent inbreeding?

A group of 35 superhumans from the future get trapped on the alternative Earth still in the Dark Ages. Banding together they take control of a small country and establish themselves up as kings and ...
5
votes
4answers
736 views

Planning of population explosion after an apocalypse

After a global apocalypse, a remote, large island with fertile areas and large amount of livestock and pre-apocalypse technology is populated with 8 humans. Description of 8 humans are as follows: ...
-1
votes
5answers
437 views

What would be the human population 200 years after 8 slaves escape?

Okay so in my setting, long story short, it starts off with a group of humans escaping an alien fleet they were enslaved by and conscripted into, and they find an earth-like planet that's smaller than ...
2
votes
4answers
302 views

Reboot society with modern knowledge [closed]

Here's a thought experiment I've been pondering for a while: Make a copy of Earth as it existed 5000-ish years ago, with all of the plants and animals, but without any people or any traces of human ...
3
votes
3answers
495 views

Long term living without sunlight

May be the wrong site, but researching for a writing project... What effect would there be on a group of humans living in a lightless and cramped environment (assume underground) for nearly 800 years, ...
5
votes
3answers
660 views

Could just a few humans recreate society?

In my scenario, a tremendous war wipes most of the humanity. While pockets survive here and there, the biggest part lives in one city, totaling around 3000 to 5000 survivors. It is also important to ...
0
votes
2answers
220 views

A friend has an idea for a PA colony traveling to Proxima Centauri B but need help fleshing it out

So, my friend had an idea for a weird Post Apocalypse society traveling through space towards Proxima Centauri B, and she's trying to figure out where the population would be 50 and 100 years after ...
3
votes
4answers
350 views

Reasonable starting population?

Here is something a bit more rigorous related to my Kepler Bb Civilization I thought 100 humanoids transported with these criteria: 1:1 male:female ratio No children below 15 No ill or otherwise ...
4
votes
4answers
799 views

How can newborn babies survive without any adult human help in a new planet? [closed]

A few centuries from now, earth is doomed. To survive, humanity decides to send spaceships to the closest earth like planets. The trip will last centuries and is the last hope for humanity so multiple ...
6
votes
5answers
664 views

Minimum Population For a High Tech Society?

So I was thinking about minimum viable population levels for a colony and it hit me that there are two industries that probably can't be made to work at small population, but that you need to have a ...
-5
votes
3answers
270 views

Future People on Earth [closed]

I watch the TV show The Last Man on Earth and there is only a handful of women and men living. In the show the few are trying to conceive. They haven't covered how eventually they will have to inbreed ...
0
votes
4answers
715 views

How does a small starting population affect diversity of a colony?

Scenario: A colony of 20,000 is founded, and has no access to any further inhabitants. Assuming this colony is humans of varying traits (genetics such as skin color, eye color, etc) with no single one ...
2
votes
3answers
416 views

Travelling in space for 6000 years, how many persons are needed? [closed]

So a spaceship is on its way to a new planet. The crew needs to survive during 6000 years on board. They will not get any help and they need to survive on their own. How many persons would need to be ...
3
votes
2answers
275 views

How many people could disappear and leave a functioning society [closed]

This isn't strictly related to a writing project, but I have been lurking for a while and have been amazed by the different questions that the people here are able to answer. If there was a major ...
2
votes
1answer
164 views

How can waste be disposed of in an isolated system?

I have in mind a world where a small colony of humans are isolated within a cylindrical force field in a desolate land of clay. With no tools their only option is to dig and, upon finding food (...
4
votes
2answers
176 views

How would a group of survivors with a rebel criminal get along stranded on an alien planet? [closed]

The rebel criminal committed something terrible that gave them their fate to be stranded on the planet. The other survivors believe that he is the one to blame since he's the only person from an anti-...
4
votes
2answers
173 views

What is the minimum earth population required to keep up the current technologic state of the art long term?

I'm wondering what would be the minimum number of people living on earth required to keep our current level of technology, e.g., in each field the state-of-the-art. Many technologies have long ...