Asklemmy

After reading A City on Mars by Kelly and Zach Weinersmith I think a O'Neill Cylinder spinning spaceship for artificial gravity type is more achievable than planarity colonisation.

But the main point of the book, and I am fairly convinced of the more I think about it, is that it is a lot of effort and risk for not a lot of gain and we are entirely unprepared for space colonisation.

Neither. There's plenty of room and resources here on Earth. I think it's fine to do space exploration and even have research bases on moons and other planets, but I just don't see the imperative for colonization.

Both.

Genetically modify ourselves so that we can live both in zero gravity (and maybe survive short exposure to vacuum) and on other planets.

Actually, both.

We should stay fucking put until we figure out how to end greed and racism once and for all

I don’t think space habitats any significant distance from Earth will be possible. Mitigating the increased radiation will be tough enough just trying to get to Mars, much less trying to stay in space out that far. At least on Mars we can hang out in old lava tubes or something.

How to survive in space: Develop ways to survive in space only first. Once you manage that all the other problems are trivial compared and you don't have a single point of failure (aka our planet) anymore. Isn't that obvious?

If we are capable of doing one, then we can do both.

yes.

if we want to become a true space faring species resilient to all that the universe can throw at us we will need both

Both! All three!

C) Undersea habitat domes!