Humans run out of livable space. Which is more likely? Dome cities on on Mars or dome cities underwater?

Our we talking about overpopulation, or space is limited due to a post apocalyptic world and vast areas being uninhabitable

In a genuine overpopulation scenario, the reproductive rate would drop below replacement, correcting itself.

Never stopped people from living in Florida

>Humans run out of livable space.

So we assume they have a source of clean energy because otherwise the ecosystem will begin to die and Humans with it. If so then they probably wont, why stay on an overpopulated Earth when you can send large populations into space? I imagine that SOME industry will replace the "old energy" industry and with clean energy you could a resurgence in the colonization industry, a bit of a leap but something has to replace it. That and with over-population comes the creation of a vast underclass that could easily be herded into working for the space industry and be willingly sent into outer space with the romantic idea of the new frontier. Something like the wild west or the conquest of the americas.

Space is the answer, clean energy will change the culture towards the pretense of ecological sustainability and over-population contradicts that, so send them to space.

Can't you fit the worlds population in France or something?

Build city on floating platform blocks that enables the building in the middle to be lowered beneath the sea when storms hit, Tokyo 3 style.

In the same way you can fit every elephant on earth into a 170 meter sphere. Which is to say, only briefly, and with terrible results

>If people lived at the same density as they did in Kowloon Walled City
Unsustainable and undoable.

I think if you piled all the people on Earth into one pile, it'd fill a quarter of the Grand Canyon or something.

Problem really isn't space, but habitable space. Sure, you can live in a hut in the middle of a desert, but can a whole city? Larger populations need more resources and scarce areas with poor accessibility would suffer from lack of resources as everything would have to be brought to them, calling for a massive infrastructure to do so, and if the place isn't producing enough to make up for all that import...

I mean we still need space to grow food

be advised, Humans, and all the shit we need to survive generates heat. We will inevitably hit a limit on how many people can live on earth based on the amount of energy we can radiate away from the earth

Having enough space to live in is not and has never been the problem. There are tons of other problems that come from large populations, but simply putting them all somewhere is not one of them. The food they eat and the waste they produce are much bigger problems. If we actually got to the point where we had so many people that we were running out of places to put all of them, that would require that we had already solved issues like "where are we growing all the food, if not on earth?" and "how do we keep all the waste heat from all these people and the machines they use from cooking everyone?"

In which case, we would almost certainly have the technology for orbital space habitats.

It is unlikely to run out of space, but it is possible if the population keeps growing.
The problem is not even how to fit the population, but how to feed it.

This will probably never happen because we are really good at fucking things up for ourselves.

Eat the people.

I remember some scifi comic short story where investigators were going under some massive future city (basically a 40k underhive) and at the foundations found people living mostly on growing mushrooms on the concrete pillars that kept the city up. The downside was that the mushrooms eroded the pillars. They tried to make them understand that if they don't stop, the whole city could collapse. Naturally they met with an unfortunate fate for trying to stop people from growing their food (and I think while they did promise them food deliveries or to take them up, the people whose status underground was tied to the farming, weren't too happy about losing that status).

>In which case, we would almost certainly have the technology for orbital space habitats.
And if we have that we pretty much have no problem of space since there is a lot of space outside of Earth

Turns out space is full of space. Who knew?

Scarcity of resources would kick in long before we ran out of places to stick people.

It would be easier to just start building cities as arcologies with massive population density at the center and surrounded by farmland.

I love how tg solves even the most complex of problems.

Hope you like your cities being destroyed by krakens and leviathans.

Fuck the surrounding. Build the farms INSIDE the arcology. That way you'll get some kind of thermal regulation.

A war that will cull the population. Seriously, we are good at keeping our numbers in check.

Jesus man, hydroponic farms would suffice.

>Humans run out of livable space
That's never going to happen. The land we actually live on is a tiny fraction of the amount of area needed to support a person. Mining, industry, agriculture and waste disposal would all be impossibly space-constrained before there was even the slightest concern about where to fit the actual people.
Consider: There's currently one person per 70 thousand square meters of land.