Hi guys, I was reading some stuff about general relativity and the first impression is that isn't completely the follow-up to SR. In what I've read it has a different assumption about inertial frames, that they are only significant only locally. What does this really mean and what are the differences in the conception of space time between GR and SR in this manner? Can all bodies that are in a uniform state of motion be considered inertial reference frames, but the only difference is that their plane of simultaneity has a local (limited spacetime area) meaning instead of global? I appreciate your answers and opinion. Regards.