For the last few years, the idea of building parallel societies has been one of my main topics of interest. This idea has been around for decades (see Parallel Polis, The sovereign individual, etc); however, it has recently been popularized by Balaji Srinivasan in his Network State book https://thenetworkstate.com/ which I recommend everyone to read
I was just in El Salvador for the Adopting Bitcoin conference and gave a little talk on why we need parallel societies to keep the Bitcoin dream going and why I think the Muslim world might play an important role in it
https://talks.adoptingbitcoin.org/adopting-bitcoin-2023/talk/AE7AR9/
(the talk is not out yet but you can find the slides if you click on the link)
Would love to get your feedback as well as learn about other Bitcoin-centric parallel societies/network state projects people have come across