All the peoples of the world except Dwarves pretty much are undergoing total societal collapse
Whatever gave you this idea? The 8th century was chocked-full of reclaiming, especially by the elves, but also Adilatír outside of player influence. Yes, there hasn't been a non-Monastery non-Fort settlement creation since the start of the 3rd century (the castle
Cusithxetan was the last built in 205), which is very weird. Omon Obin would have been fine in its isolation if not for those pesky (insane) adventurers, but even so, rapidly-changing Law-Givers isn't as bad in an AI-controlled civ as it is IRL. Other human civs still have plenty of sites to their name, and void characters (i.e. computer generated dwarves/humans/etc.) keep populating those places, so nothing short of a war by the goblins (which seem pretty skittish in this world despite having for over a century more pop in a single civ than all other civs combined) or adventurer game-breaking shenanigan can send all these societies into "total societal collapse".
The closest that was to happening was in the 4th century, when the civs of the world were on the brink of collapse and ganged on Oddom's
Mishthemdeduk.
What's most worrying is the elven race. I haven't seen a void elf popping up since a time before time.
Ribiromimi society may survive, on account of all the goblins, but the elven race is slowly but inexorably heading towards extinction.