So i read several sources of information.
But I can not understand, who destroyed the world?
Just Aetherials? And then when the world was destroyed, Chthonians came.
Or these two fractions together? Their war destroyed the world.
Think it’s their fighting that caused it
Mogdroga implies it
but somebody knows the exact answer?
The war between the Aetherials and the chthonians is what destroyed Cairn.
From the Game Guide:
Cairn has become ground zero of an eternal war between two otherworldly powers, one seeking to use human bodies as a resource, the other intent upon destroying the human race before that can happen. This cataclysmic war has not only decimated human civilization but is warping the very fabric of reality and, in its wake, giving life to new horrors.
If you are interested in more details, then talk to Captain Somer and other members of the Black Legion. And I recommend to read the following lore notes:
- Inspector Creed: all of them, but the 8th entry is most enlightening
- Survivors - Homestead: Trip South; Dangerous Roads, Imperial Proclamation and The Journal of Duke Cavanil
- Factions: Black Legion Scouting Report; Praetorian’s Report
- Survivors - Darkvale: all of them
- Enemy Insight: Avalline’s Notes; Final Sermon: The End of Times
This is by no means a complete history of events. As player you are just as knowledgeable as your character.