The Elder Dragons
The Elder dragons is world creation theory proposed in Book of folklore. Theory links the creation and 'life-force' of Gielinor to existence of ancient race of creatures known as the Elder Dragons. As long as those dragons lived world would continue. Erasing whole race would result in the 'end of the world'. It has been speculated that Elder Dragons could be Dragonkin who were annihilated by Robert the Strong. Even though Dragonkin are believed to be extinct, survival of few could explain continuing of the world after Dragonkin slaughter.
Sceptics claim that the myth of the Elder-dragons was invented to cast doubt on claims that this realm was lifeless until the gods first arrived.
The theory of Elder Dragons is not widely known, nor is popular compared to theory of world creation by Guthix.