The past half-century has been a treasure trove for those fascinated by historical instances of moral panic, conspiracy theories and the enigmatic world of secretive satanic cults. The wealth of examples, ranging from the peculiar to the outright cruel, offers a captivating journey through the evolution of societal fears and beliefs. It is something of an irony that in the increasingly post-religious Developed World, the void has been filled with a multiplicity of speculative spiritualties, quasi-faith-based therapies, mystical curiosity and fascination with the paranormal. Little of the value ascribed to such a zeitgeist is evidence-based. Nor does it need to be. In a world of ‘alternative facts’ that has also steadily habituated the public into post-truth political discourse, evidence and veracity are not what they used to be.