At the beginning of all things was the Age Before, a time before time, before the world, before the gods, where only Alasdair existed.
The Age of Harmony began when Life, in all it's unpredictable forms, necessitated a keeper and Alasdair answered with a new thread and the third Primordial, Cainan.
The Age of Discovery began when Alasdair, seeing that Tidhan had brought balance to the void, created a second primordial to bring into existence something more than balance.
Second Age of Dissent.