So everyone 'forgot' the Warriors of Light (as they called them) who died at Carteneau.

Does anyone have any theories as to how widespread this memory loss was? I've always presumed it was somehow connected to the bright light - the vast flood of aether? - that is all anyone can remember, but in my head that's always implied it had to be localised. Within a few malms of the Battle at any rate. But obviously everyone in Eorzea seems to have 'forgotten' (by forgotten, I mean that names and faces are gone, but folk still know the WoLs existed) so that makes it more widespread. Is it more widespread even than that? Worldwide?

Of course it's not canon that the current WoL was at Carteneau (is it canon?) but if they were, no one does remember them (except Minfilia and Cid). Gaius doesn't remember them. Ifrit and Garuda don't remember them (although how much primals recall of previous incarnations is a whole other question). If they are Auri, say, or Viera, do their families who were (possibly) not in Eorzea remember them?

Also what did cause the memory loss. Was it the surfeit of aether raised by Bahamut and Louisoix? Or something else?