Long ago existed the Late Empire of Man, which controlled the entire known world. The Late Empire wielded technology greater than anything we are capable of now, with roads that spanned continents, towers like mountains, and cities which grew in all directions. Then it all ended, as all of creation must. No historian or master of lore quite knows what caused it. Some say it was the wrath of one god or another, while others say it was corruption and vice. Now, all we have left are ancient texts and the desolate tombstones of ruins.
The most important result of the collapse was the Fire, a magical event where magic returned to the world. The Fey Races returned to the world, and magic twisted the creatures of the forest into the Sylvan Races.