Time travel is self-suppressing

Maybe they are all mostly dead and ever-more-feral survivors ridden by the radiation- and pollution-borne crippling genetic sicknesses are birthing still-born and slowly dying out while picking through the debris left from the civilizational collapse caused by global warming, ai, and the resulting world wars.

And the last stronghold of civilization are warlike and numerous but illiterate Tate descendants in the mountains of Romania, unable to build anything more advanced than a cudgel used in the rituals to determine the alpha leader.

Maybe you can only create rifts, and you need to create one before travelling back and forth. So only time travelling after the first time travel rift has been opened. Otherwise it'd break continuity.

EDIT: If you created such rift and nobody would come out, then you'd have to start worrying.

Interesting:

> Therefore, I conclude that, assuming my model, time travel is self-suppressing: the timeline is continually rewritten until it inevitably reaches a timeline with no time machines ever being constructed. At this point, no further changes to the timeline are possible.

Future people will have a Holodeck to simulate the past. No reason to actually go there.

I have always thought that time travel is a solution to the fermi paradox.

I've always suspected the reason is this century is just incredibly boring and literally nothing notable or even remotely interesting happens.

Makes me think of this Asimov classic where you really can change the past

https://archive.org/details/dli.ernet.526852/mode/2up

where it makes sense because people established an orthogonal dimension of time and this movie

https://en.wikipedia.org/wiki/Predestination_(film)

based on another Heinlein classic

https://en.wikipedia.org/wiki/%27%E2%80%94All_You_Zombies%E2...

where you can't because it's all just a knot.

Looking at the actual link itself, is this one of those papers that takes a thought experiment and tries to evaluate it using abstract mathematics/statistics? That's what it looks like it's doing. How is it actually useful to apply Markov chains to such unknowable suppositions? Is this analytical philosophy

time travel backwards is impossible. but there are undoubtedly time travelers from the past going forward in time

they’ve all gone 4025, where the real party is.