During a few issues of X-treme X-men we get a look at Kurt's home reality, and as such we know some stuff for sure. It was a cancer-free, green-energy-only technotopia wonderland with full mutant civil equality (but not real social equality) and then it got taken over by robots who killed everyone (and then got nuked by Kurt, but they're fine, even if he probably screwed up the environment a whole bunch). That's not a lot of detail, and what there is is sometimes contradictory, e.g. Kurt is described as a high school student, but he says he's from a school with a P.S. code, not a H.S. code, and could only have been about twelve years old at the time. So, long story short, I have a lot of headcanon and have been forced to choose which details are correct sometimes, so under the cut is an attempt to sort out what things were like before the apocalypse, everything from how the United States of California came to be to random ideas about what other Marvel notables were doing at the time. Some of this information is extrapolated from the limited available info, and some is purely made up.
( World History )( American Civil History )
( Other Heroes )
( Kurt's Personal History )