For me:
- System: Anarcho-Capitalism.
- Money: Hashgraph based stable coin, with Multisig wallets.
- Written Language: Korean Language- Hangul.
- Number System: Kaktovik Numerals.
- Calculator System: RPN
- Clock System: Swatch Internet Time
- Calendar: Solar Hijri calendar.
Pretty much post scarcity like star trek. For me it would be humans not living on any habitable planet but leaving them to be as they would while living in space.
Not to edit your utopia, but a post scarcity society would be a dystopia, for more info about that, I invite you to check this Wikipedia article: https://en.wikipedia.org/wiki/Behavioral_sink
As humans would fill this planets within 1000 years of post scarcity, it would be bad.
Post scarcity doesn’t mean high fertility.
did you read past the first sentence? about not living on habitable planets?