The arrogant and prideful Sidereals, possibly under the effects of the Great Curse laid upon them by the Neverborn, blindly followed their predictions without taking the time to verify them, orchestrating the end of the First Age, known as the Great Usurpation.
The arrogant and prideful Sidereals, possibly under the effects of the Great Curse laid upon them by the Neverborn, elected the path that offered a guaranteed future for Creation, if one less marvellous than the current age. As such, they orchestrated the end of the First Age, known as the Great Usurpation.