So i finally got time to study it. I did not want just to run through as this topic is interesting to me. I personally believe (like that matters lol) that any interaction with the past would create a hard-fork (yes yes just like crypto) and they both continue their ways after a split. So basically you can not change the predestined future in a given universe but just crate an alternate reality that can be forked further. That might be the reason why we are never visited, or we are visited but such a visit results in a fork that we are unaware of. Theoretically number of states an atom can exist is limiteles until it is measured so scaling is not an issue here.
Another theory i have that time travel or recreation of past or modelling future might be possible. Recreation (travelling back the timeline) actually being easier due to collected data that can be traced. BUT. You can not change it since matter can not travel back in time or it will create a fork. But you can effectively see past and probably future without a chance to change or influence it. Knowing of a climate change and visible obvious facts does not have major change how people behave, does it? So if such a grand scale foreseeable fact does not influence our current behavior why do we need any detailed predictions. This second part is more philosophical one. The first one being very real and practical i believe :DDD
I think it is possible to trace the past and with enough data influence the future to go the way you want it to go, which in some ways is time manipulation but not so much travel. However if you are talking simulated realities then anything is possible within the boundaries of the simulation.
Why does such a grand fact not influence? because money, costs money to enact change.
Thanks for taking the time to read over this. Hope you have a wonderful day. <3
Manipulation or travel itself is just a different form of medium... I believe that timeline itself is linear in any given fork and the number is infinite. It costs moneybto start a war too. Why it is so easy then?:) Since it is deeply phylosophical it could continue infinitely :) I have genuinely enjoyed the read, thank you for sharing and will be waiting for other posts to dig in :)