Greetings. To survive long term, humans need long term :

• Air

• Water

• Food

• Gravity

• Atmospheric pressure

• Exercise

• Sleep

• Heat

• Social interaction

• Activities

• Sewer

• Medicine

• Reproduction

• Schooling

What else would you add ?

Love. Compassion. Meaning/Goals. Challenges. Spiritual pursuit/inwardness. Green spaces. Orgasms. And last but not least: something to complain about.

I’d also consider radiation protection. Even more importantly, I'd consider how to fix things when no one from the outside can help for years. Here, you can just get a spare part or call someone. Out there, you'd probably have to get everything working again yourself.

Privacy would certainly be an issue, too. Being in a confined space with the same people all the time sounds exhausting to me in the long run. Which of these things do you think would be the hardest to get under control?

Thanks.

• Sunlight - ?

  If around -say Saturn- is it reasonable to be on the list or at such distance our sun does not provide a discernible amount ?

3 hours ago, Externet said:

Thanks.

• Sunlight - ?

  If around -say Saturn- is it reasonable to be on the list or at such distance our sun does not provide a discernible amount ?

A more generic category of power might cover this and other things (e.g. heat)