I doubt such populations currently exist, though secrecy would be a requirement to defend against active attacks, so I suppose anything is possible. I'm also not necessarily suggesting we do this, but for those interested in colonizing other planets solely as insurance against major life impacting events on Earth it seems like this would be a more feasible near-term goal to achieve. It would also be an excellent test of the systems we'd need to deploy in the even more remote and hostile environments of other planets.
From my brief research, "breakaway civilization" is a keyword mostly associated with some extreme conspiracy theories concerning the Nazis and the inventions of Nikola Tesla?
From my brief research, "breakaway civilization" is a keyword mostly associated with some extreme conspiracy theories concerning the Nazis and the inventions of Nikola Tesla?