Bingo. There's no real "History of Altera" curriculum, but all characters would have at least some knowledge of the Exoduses, and possibly even the Cataclysm, though younger characters and newer players can of course have that knowledge through word of mouth or as fairy tales told to them, with events like the Cataclysm likely fading into a historic footnote due to so few people having been there (ICly, it happened over 2000 years ago and there's precious few 2000 year olds left).Depends on your RP group, usually. The various Exoduses (what an awkward word) and brushes with Corruption are generally good information to have as common knowledge for your character, but you'll need to track down someone with a better memory than I. I can't even remember the Elemental stuff that preceded the Return very well right now.