QAnon won't last forever. Sooner or later, even if the failure of their prophecies doesn't necessarily do them in, conspiracy theories unravel and violent movements associated with them eventually end. I make this prediction based on a study of the demise of recent violent religious and religious-related movements around the world, including ISIS, which is the subject of my forthcoming book, When God Stops Fighting: How Religious Violence Ends (University of California Press). Often, I have found, they erode from within. They can vanish as quickly as they emerged.