Questions tagged [population]

For questions on population sizes, maximums and minimums, how they are affected by different events, etc.

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what is the minimum size for a human settlement to ensure genetic diversity? [duplicate]

assuming pretty good access to things like food and water, and a regular to slightly extended lifespan, would a population of ~120ish adults be enough to avoid inbreeding issues over time? basically, ...
zbird's user avatar
  • 43
14 votes
11 answers
5k views

Can selective breeding maximize human intelligence without major complications?

I am writing a story about an extreme meritocracy that applies artificial selection and eugenics to humans. This society (called Sophia) views intelligence as the most important trait to have. Almost ...
Rhymehouse's user avatar
  • 3,563
0 votes
3 answers
272 views

How small can an isolated society be at the technological level of the 18th century to also be self-sufficient?

Good morning everyone! I am pursuing the idea of a society inspired by the ideals of "small is beautiful". Smallness has a value in itself. And that is what I want to express with the ...
Brobi's user avatar
  • 11
0 votes
0 answers
60 views

What's the minimum amount of people required to create a growing population? [duplicate]

I'd like to know how many people it would take to begin a genetically stable civilization. I don't need/don't care about the infrastructure aspect, only the genetics. Scenario-wise let's assume there ...
Mocascoolai's user avatar
11 votes
15 answers
8k views

My Medieval kingdom has birth control, why is the population so high?

My world is roughly the same as the middle ages but has a natural form of birth control in the form of a root that can be grown and consumed to prevent pregnancy. Because of this root, opportunities ...
Bryan McClure's user avatar
2 votes
2 answers
340 views

How many members of a species would be required to prevent inbreeding? [duplicate]

I’m writing for my Safespace series and I’ve hit a snag: I want Homo sapiens to have been abducted from Earth about 10,000 years ago so that when humans expand to the wider galaxy, they find “...
Jobah619's user avatar
  • 117
0 votes
3 answers
151 views

How large of an initial population would it take for these new traits to average out into the standard population of the world?

Let's say, many years ago, hybrids between humans and other mammalians were created and introduced into the world for various purposes. They have the same cognitive abilities as the other humans, and ...
Hal Cyon's user avatar
12 votes
9 answers
5k views

What are some reasons for the population of a small, relatively unremarkable area to suddenly boom?

In the semi-democratic Empire known as the Aurean Dominate, the small peninsula of Sparteia has seen a population explosion over the past two centuries or so. Located in Argentolia, the most populous (...
The Weasel Sagas's user avatar
1 vote
0 answers
100 views

How would a country or kingdom instill loyalty and patriotism in its citizens and military? [closed]

How would a country or kingdom instill loyalty and patriotism in its citizens and military? With technology around 1930-1940
Kingadamthe1st 's user avatar
5 votes
3 answers
178 views

Calculating population sizes through time?

My initial google session resulted with no luck. Does anyone know of any papers that discuss how historians attempt to calculate population sizes? That way I can better work out population sizes of my ...
VedHanna's user avatar
  • 597
-4 votes
2 answers
178 views

How much would a population be able to recover after half of them being killed? [closed]

In a medieval setting, a kingdom had about 50% percent of its population killed (this includes all ages). About 50% of infrastructure was in need of repair, and a separate 25% of infrastructure needed ...
lost_not_found's user avatar
2 votes
3 answers
571 views

How long would it take for Mesoamerica to recover, if at all, had colonization never happened? [closed]

So, to give of context, the setting I am writing is very out-there. But I still wanna take a realistic approach to demographics and similar issues. In the setting, a very fantastical apocalyptic event ...
Thatmariohead's user avatar
3 votes
2 answers
1k views

Could all of human population fit in China, India, and Mongolia?

I have a scenario where Aliens must escape their Star system because a star 5 light years away from them is going nova soon. They find humanity and learn all about them in a few years - our whole ...
Mishima's user avatar
  • 979
4 votes
5 answers
555 views

How does proximity to a large city affect the growth of nearby towns?

Imagine a town that is on the road between two large cities. However, it is within one day's worth of travel of one of those cities. How would this affect the overall growth of the town? I can imagine ...
Arthaban's user avatar
  • 141
5 votes
4 answers
570 views

Stranded mining colony using its own resources to build an interplanetary spacecraft: how long to completion can I credibly make it? (More = better)

Setting In the not-too-far future, Mars hosts a few mining complexes that extract, refine and send materials back to our planetary system, as well as some scientific research bases. Commutes between ...
Kubler's user avatar
  • 465
16 votes
11 answers
5k views

What problems would a truly gigantic fantasy city encounter?

Supposing a world that falls somewhere between low and high magic, what would stop a city of truly epic size from existing? The city is a city-state that has existed for millennia. It is pretty much ...
biziclop's user avatar
  • 2,997
3 votes
3 answers
270 views

Indian Ocean continent - which humans get there first?

Trying to develop an ATL in which several 'lost' continents in the Indian Ocean - namely Kerguelen, Broken Ridge and the Mascarene Plateau (just east of Madagascar) - never end up being submerged and ...
HubbaBubba's user avatar
3 votes
1 answer
110 views

What level of phenotypic change is plausible over 10-15,000 years?

I'm developing a story with 4 distinct group of humans who inhabit 4 geographically separated and ecologically distinct islands (Iceland to Greenland sized). These groups descend from a single diverse ...
DMacc1917's user avatar
  • 946
1 vote
2 answers
212 views

How much could a population of 15000 grow over the course of 50 years?

How much could a population of 13,000 grow in 50 years? They are just coming out of a 13-year war with many deaths and few births. They have no medicine or technology to extend life, many plentiful ...
killjoyXIII's user avatar
16 votes
10 answers
6k views

Max tech level for society of 200,000

Given a remote island colonised by modern day (2023) explorers, with a total population of about 200,000 but cut off from the outside world for political reasons, what level of technology could they ...
William.L's user avatar
  • 326
5 votes
3 answers
342 views

How many children could a human have in one pregnancy (with safety being no concern)?

There's a nation with extreme fertility and population problems. Someone suggested the government could induce certain candidates to have a great number of children in a single pregnancy... at the ...
user27657's user avatar
4 votes
4 answers
361 views

What population would the Americas have if the natives were as advanced as Europeans?

If you check a list of the most densely populated nations, a lot of New World countries are near the bottom and almost no Western Hemisphere nation (excluding small islands) are near the top. The ...
Rhymehouse's user avatar
  • 3,563
2 votes
3 answers
236 views

Starting population to reach 1 billion people in a post apocalyptic scenario

Let's assume a post apocalyptic scenario, specifically a world which's sentient population was critically reduced due to a series of calamities, such as a sudden climate change chain reaction caused ...
JuimyTheHyena's user avatar
-2 votes
5 answers
154 views

How much could a population of 100 million rise in 30 years? [closed]

How high could a population of 100 million people rise in 30 years, living on a terraformed planet with more or less limitless resources and advanced life-prolonging nanotech?
user98816's user avatar
  • 8,531
3 votes
2 answers
415 views

If the current population of humanity along with necessities could fit on a spaceship, how large would that ship need to be?

Here's the picture. Earth is beyond saving and is too polluted to be habitable anymore. My plan is to have this ship built on the moon, using materials from our asteroid belt. A bit of a problem is, I'...
raevynn's user avatar
  • 335
1 vote
0 answers
75 views

How would a secretive vestigial population grow alongside humans, given that they live different lifestyles? [closed]

This is a heavily revised version of a post I made earlier, along with some edits from my friend Enthalpy. This new post is strictly about population growth, and contains no extant references to third ...
NaN-Gram's user avatar
12 votes
13 answers
4k views

A subtle war between the sexes

In this question, I detail a world with a third human sex, lilim, who have bat-like wings and taloned feet like a bird's. The TL;DR is that lilim give birth to equal numbers of men, women and lilim (...
Monty Wild's user avatar
  • 59.5k
1 vote
0 answers
147 views

How would the UK be affected if 90% of the world’s population died from a virus? How long would it take before it would impact climate change? [closed]

The idea I'm currently working with would be the world overpopulated, things a bit further in the future in terms of the effects of climate change than now, being hit with a global virus that kills ...
Bethany's user avatar
  • 19
7 votes
3 answers
209 views

How would populations work out in a society with people of vastly different sizes?

Let's say we have a society with people (living creatures with human-like intelligence) of vastly different sizes, from mouse-sized to elephants. People have jobs like us humans do: some physically ...
ChocolateOverflow's user avatar
14 votes
14 answers
5k views

Solutions for overpopulation for an immortal race

Imagine a city full of people that are immortal; they can't die by aging and normal weapons can't hurt or kill them. So the government needs to find ways to overcome its overpopulation issues. After a ...
Crimsoir's user avatar
  • 437
4 votes
3 answers
224 views

What's the largest population we could sustain indefinitely on a distant space station?

Imagine that humans put a space station in orbit around something further than 0.5 AU from Earth. So: not Earth, not the Moon, none of our Lagrange points -- none of the "easy" spots. The ...
Tom's user avatar
  • 14.5k
-2 votes
1 answer
153 views

Impact on genetic diversity with 6 person mating groups

Context I know enough about genetics to know I need to ask others. I'm writing an alien humanoid species that revers the number 6 as part of their culture and religion. Their marriage equivalent forms ...
Sith Philosopher's user avatar
5 votes
1 answer
128 views

Can the culture of 500 people last after 1000 years? [closed]

A cabal of necromantic nobles and their (human) servants and retinues fled west after their expulsion from the old empire. They landed in a new, mostly wild realm. Probably a fifth of the colonists ...
Lorsh's user avatar
  • 51
3 votes
4 answers
497 views

What is the minimum population for a civilization to advance technologically, if given knowledge of math, physics, astronomy, etc

My civilization has global free energy, understands the physics of antigravity, etc. It was able to advance technologically through its own efforts. Six separate civilizations become a confederation ...
An-Ima's user avatar
  • 59
6 votes
2 answers
382 views

Which areas of USA would have the most successful centers of growth after nuclear holocaust?

This is related to my previous question: How many survivors would grow on earth years after a worldwide nuclear holocaust? In an earth with roughly a billion modern day survivors, and 20 million ...
SuperYoshikong's user avatar
7 votes
2 answers
2k views

How long would it take a parasite that transmits via parent to child to spread through a population?

So here is the basic setup. The parasite lives in the cells of it hosts and can only spread via reproduction, and will spread 100% of the time to a child regardless if the infected was the mother or ...
MrDracoSpirit's user avatar
3 votes
1 answer
134 views

What would the survival rate be for a group of people forced into an underground, bunker style community?

Suppose 1000 people were forced underground into a relatively well set up bunker style community. Assuming they have no official leadership or organization to begin with, they must rapidly learn their ...
Willough's user avatar
  • 125
2 votes
3 answers
416 views

Only 35 random people from disappeared Earth population are alive at any one time, how long before "new" babies are born?

Based on: If everyone in the world disappeared except 35 random people, how long would it take for one of them to realize they're not alone? Everyone suddenly disappears from Earth except 35 ...
Malady's user avatar
  • 4,476
11 votes
10 answers
3k views

How can a massive walled city be viable?

I'm working on a small story, and in it I'm wanting to include a city surrounded by multiple layers of walls. The walls themselves are colossal, but were created/held up by sorcery. I would go into ...
Atriol's user avatar
  • 353
1 vote
1 answer
197 views

Population recovery time after a fantasy nuclear winter

One of the major events of my setting is an all-out war between two factions of gods (and their human subjects) using basically the magical equivalent of nukes and nuclear technology. The world was ...
Myotis's user avatar
  • 161
1 vote
2 answers
307 views

With a Fertility Rate of 2.2, all else being held equal, what is the population doubling time?

I get confused with the math here, and wasn't able to find an easy fertility rate to pop. growth to pop. doubling time online. If anyone can walk me through the answer here, that would be very useful.
Jshupac Future-Economics's user avatar
6 votes
3 answers
262 views

How fast would a colonizing population grow on virgin soil?

I have a story where the setup is that, ~600 years prior to the story's beginning, there was an apocalypse of a magical nature that rendered most of the world uninhabitable. A few survivors from ...
sakamism's user avatar
2 votes
5 answers
201 views

A nation is using its citizens as a distributed computing network to solve some kind of problem. What kind of problem is it trying to solve? [closed]

Long story short, the government of The People's Representative Democratic Federated Republic of Southeast Countryistan has its citizens fill out a couple of forms per day, each with some kind of ...
KEY_ABRADE's user avatar
  • 12.8k
1 vote
3 answers
165 views

Self inflicted extinction in a modern setting - Plausibility and Duration?

Suppose there exists a species of humans which are better physically, mentally and aesthetically(in a conventional way) by at least three standard deviations(any large margin will do) when compared to ...
Thaspin's user avatar
  • 551
6 votes
5 answers
322 views

What Might the Highest Plausible Fertility Rate For A Wealthy Society Be?

The world's fertility rate has fallen to about 2.4, and in the next few years may reach replacement levels (2.1) outside of Sub-Saharan Africa (where it's still 4-5, though falling quickly). Even some ...
Jshupac Future-Economics's user avatar
1 vote
1 answer
143 views

What is the largest population a single spaceship could sustain? [closed]

In this setting I'm brainstorming, a significant percentage of humans live not in planets or static habitats, but in massive ships that traverse the cosmos at ultrarelativistic speeds. As such, these ...
LNSS's user avatar
  • 19
-2 votes
1 answer
146 views

Rebuilding humanity from forty-ish people in the middle of an alien world within 400 years [closed]

Near the beginning of my fictional worlds history (that is, when things start getting bad)the small population of around 10,000 humans is mercilessly slaughtered by the recently formed population of ...
skout's user avatar
  • 2,068
2 votes
2 answers
319 views

How many adventurers?

So, On average, how often one could encounter an adventurer in a world the details of which are written below? The World Population Roughly 13 people per square kilometer overall, with up to 55 in ...
acki02's user avatar
  • 387
4 votes
3 answers
1k views

How could my island-country mostly populated by massive humanoids subsist its inhabitants?

In my prospective dramedy science-fantasy children's videogame Salade de Fruits (which means naturally Fruit Salad), there is an island-country comprising a total of eight islands: The smallest has ...
mammifereviolet4694's user avatar
3 votes
1 answer
232 views

What population size is reasonable for a moving, steam powered, predatory city?

For a DnD campaign, I'm designing a setting with steampunkish tech level, as well as magic used to explain tech accomplishments not possible with real world physics. Almost all settlements in this ...
jayb1rd's user avatar
  • 33

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