Post-F.I.A.T

Post-F.I.A.T is a very futuristic iteration of F.I.A.T set after Late-Stage F.I.A.T (coming soon) has run its course. As Late-Stage F.I.A.T is designed to be so efficient that the ideology itself can remain unchanged for billions of years, Post-F.I.A.T would only be viable in the far, FAR future.

How It Would Play Out (WARNING: Big Brain Science Crap Ahead)
If a state under Late-Stage F.I.A.T manages to last beyond the Stelliferous era, which ends in around 100 trillion years from now, it would probably consist of a computerized omni-mind (a hive mind containing the combined conscious and raw computational power of every biological mind that has ever existed) and many planet/star-sized supercomputers that control quadrillions of robot/hologi bodies that keep the state running at maximum efficiency. It wouldn’t be libertarian, but it wouldn’t be an orthodox authoritarian ideology anymore. Religion would also either be proven or disproved by this point, removing that factor entirely.

Back to the praxis, by the time the Stelliferous era ends, there will be no main-sequence stars left, only pathetic remnants. Luckily, by this point, ergosphere manipulation should be basic science, so the next few quadrillion years will be spent harnessing the combined power of a gigantic cluster of black holes orbiting each other to prevent them from drifting off beyond our cosmological horizon. The amount of energy gathered by these behemoths over the immense amount of time required for black holes to evaporate would be completely immense; enough to power a simple quantum computer (which in theory could store an entire Class 2 or 3 civilization if it’s advanced enough) for a VERY long time, according to the Landauer limit.

However, there is still a thorn in my side; PROTON DECAY. Of course, it you know what that is, you would also know that it would take a shitload of time to happen and it technically isn’t even proven yet, but it’s still pretty damn scary. What proton decay basically says is that every so often in trillions of trillions of years, half of literally everything would go poof. This would not violate the conservation of matter, as the protons would decay into radioactive energy and subatomic particles. But this is pretty bad news for whatever life might exist at that point, since most everything would die almost immediately after half of all molecular structures in the entire universe just spontaneously falls apart. Elements would transform themselves into lighter elements, molecules would either fall apart or react extremely violently and structural integrity everywhere would cease.

Of course, if our robot/computer technology is advanced enough, we could simply repair the damage done by proton decay in nanoseconds by converting the subatomic particles and radiation emitted back into protons. However, this would be what is probably the absolute limit of femtotechnology, as it is probably its ultimate purpose. Luckily, we would have plenty of time to work on these technologies.

The next roadblock is when Black Holes Fucking Die™. The science behind that is too complex for all of you, so I’ll put it in layman’s terms: tiny particles come out of nowhere and force black holes to regurgitate their energy until they explode. This sucks because they are our last power source. Maybe we can harness the energy of their explosion somehow, but since they’ll probably be as big as (if not bigger than) supernovae, it will be hard. And after that, that’s it. No more energy, unless we get...THEORETICAL.

Around 10^1,500 (big number, don’t think about it) years from now, pretty much every remaining particle in existence will teleport towards each other and form sad, pathetic iron spheres (again, the science is too much for you all to handle, except for maybe the Fr*nchoid Quark). Of course, in the highly unlikely event that we chance upon one, it would be a field day, but let’s be realistic; we aren’t going to chance upon one. Not even close. The odds would be astronomical. Also, a little while later (10^10^50 years), brains will start to appear. Because science. By that point, however, nothing that we can possibly do can last beyond that point, so that’s it. F.I.A.T is over after 10^10^50 years.