To understand the threats currently facing the world, one must include the dark, fanatical belief systems that operate in the shadows:
The Cult of the Damned: The spiritual engine of the @Scourge. Founded by the archmage @Kel'Thuzad, this nihilistic faith promises its mortal followers absolute immortality through undeath. Cultists revere the @Lich King as a supreme god of death, gladly consuming plagued grain to shed their frail mortal flesh and enter his eternal, telepathic hive-mind.
The Twilight's Hammer: A maddened, apocalyptic doomsday cult dedicated to the worship of the Old Gods and the Void. Cultists believe that the Ordering of Azeroth by the Titans was a cosmic crime. They actively pray for the "Hour of Twilight"—the complete collapse of mortal civilization and the unsealing of the cosmic entities buried deep beneath the earth, viewing total planetary annihilation as the ultimate form of spiritual liberation.