Immaculate Order's Heretics
As the Primordials fell to the Chosen of the various gods, they cursed their Exalted killers. The Great Curse was elaborate and vast, but its core was that the Exalted would forever be cursed with the hate, immoderation and treachery they’d shown in the Primordials’ murder. The Great Curse has dogged all the Exalted since that day, but it settled most squarely on the shoulders of the Solar Exalted. Ever since, the Solars have been subject to terrible melancholy and violent emotional outbursts.