5342
If you ever want to break your brain, try going down this rabbit hole. In fiction, breaking the laws of physics in a believable way isn’t something to be undertaken lightly.
Time and the 3-dimensional world it governs provide a framework for everything that has already happened, everything that is happening now, and everything that will happen in the future.
Within this construct, everything is connected to everything else—you can’t make changes in one time domain without affecting everything else—at least not without changing the laws of physics.
Of course, to do that, you’d have to create a new system of physics with its own laws.
See what I mean?