Brent Lee struggles to explain why he used to believe that a cabal of evil satanic paedophiles was working to establish a new world order. He pauses, looks sheepish, and says: “I cringe at all this now.” For 15 years, Lee collected signs that so-called Illuminati overlords were controlling global events. He convinced himself that secret societies were running politics, banks, religious institutions and the entertainment industry, and that most terrorist attacks were actually government-organised ritual sacrifices. He was also inclined to believe in UFOs, and that Stanley Kubrick staged and directed the filming of the moon landing. He saw...