>>16771220
You can make light cones shrink or not if you thinkg of "changing the speed of light." Intuitively, you recover Galilean physics by taking the speed of light to infinity, i.e. all events can influence each other.
Now shrinking the light cones sound like a weird limit: c->0. What happens then? This is known as the "Carrollian limit" and some fun stuff happens then. See this reddit thread for more (yeah fuck you I'm linking to a reddit thread in 4chan blablabla)
https://old.reddit.com/r/Physics/comments/1b7ubfs/