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Questions tagged [population]

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

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Timetable of life spreading on a colonized planet [closed]

Lets suppose, a ship full of a few hundred colonists crash lands on the wrong planet where, despite the odds, they try to form a functioning society. This planet has oxygen, liquid water and is ...
ImmaculateLemming's user avatar
15 votes
8 answers
3k views

How can a bloodline be rare without completely dying out?

This is an urban fantasy setting in which all manner of fantastical species of humanoid, called monsters, exist under humanity's nose, and in this setting there is a system of magical bloodlines ...
Cyrus Drake's user avatar
  • 8,165
0 votes
6 answers
2k views

Is it possible to relocate a planet? Specifically Jupiter [duplicate]

My world, Anyare, has too many people on it. Instead of having a disaster, I want them to colonize another planet. Like Jupiter. By using Jupiter’s gases, and by attaching a giant propeller, is it ...
HankyH's user avatar
  • 25
3 votes
2 answers
1k views

How many people can China geographically support?

I'm writing an Alternate History Timeline. In that timeline, the Self-Strengthening Movement implemented by the Qing Dynasty actually works. As a result, the Qing Dynasty is able to modernize, fight ...
Rhymehouse's user avatar
  • 4,401
3 votes
2 answers
224 views

Is it reasonable for one country to have a majority of a planet's population?

My planet only has about 25 million km2 of non-frozen land. Its population is about 4 billion, of which 2 billion lives in a single country. The closest real world equivalent I can find is Asia in ...
Sam Moon's user avatar
  • 631
2 votes
0 answers
91 views

Balancing demographic effects of different reproductive strategies [closed]

I am building a world with two sapient species, one of which is effectively equivalent to humans, and another one which has a series of differences. I would like to know how to tweak the numerical ...
vicky_molokh's user avatar
  • 1,811
1 vote
1 answer
160 views

What would mermaid population distribution look like? [closed]

What would the population of aquatic humanoids look like? Where would the population cluster? (ie along coasts, in shallower areas, or in warmer waters) Where would the unpopulated "deserts" ...
www's user avatar
  • 1,525
0 votes
0 answers
43 views

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
  • 4,401
0 votes
3 answers
285 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
581 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
155 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
107 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
195 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
191 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
577 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
  • 1,019
4 votes
5 answers
636 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
574 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
  • 3,017
3 votes
3 answers
295 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
113 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
  • 956
1 vote
2 answers
220 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
368 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
435 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
  • 4,401
2 votes
3 answers
255 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
174 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
  • 8,651
3 votes
2 answers
449 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
76 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
  • 62.9k
1 vote
0 answers
153 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
213 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
232 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
  • 15.3k
-2 votes
1 answer
157 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
129 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
577 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
390 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
142 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
427 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
  • 4,486
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
209 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
456 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
268 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
203 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
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