Well, I'm not sure actually. It seems to require more dimensions for causal events to 'propagate' in time. I was thinking that events can't change the future in

Well, I'm not sure actually. It seems to require more dimensions for causal events to 'propagate' in time. I was thinking that events can't change the future instantly, because information can't travel faster than speed of light (which is the normal passing of time). So if I travel from million years from the future, it should take million years for the change to propagate to my original future.