Re:obligatory (Score 1)

There is such a thing as universal simultaneity though. Two things that happen at the same time and at the same place are universally simultaneous in all reference frames. Additionally, our concept of "before" can't be screwed up too badly, because a little playing with slopes on a space-time diagram will show you that if events things happen in different places, the order in which they happened cannot be switched as long as neither is moving faster than the speed of light (which clearly doesn't happen). The spatial order of the two events, however, may reverse. This is why special relativity doesn't screw up our concept of causality, even though it might affect the length of the time interval between two events, or where they occured relative to each other.