Not everyone believes in witches: in Siberia, after all, locals blame misdeeds on ghosts, and the Irish have fairies. But for those who do, witchcraft can be incredibly threatening—and an accusation of witchcraft can be a powerful tool to control people and entire societies. To get you into the Halloween spirit, we’re revisiting our interview with one of the world’s foremost experts on witchcraft, the historian Ronald Hutton. Go beyond the episode: - Ronald Hutton’s The Witch - For the flip side of witchcraft, watch Ronald Hutton’s dramatic documentary about the good ones—A Very British Witchcraft, about the founder of modern Wicca - Frances F. Denny’s exhibition “Major Arcana: Witches in America,” on view at the ClampArt gallery in New York, explores the contemporary idea of witches through portraits of those who identify as such. One of Denny’s foremothers was accused of witchcraft in 1674, and 20 years later another of her ancestors presided as a judge in the Salem Witch Trials. - And for some spooky…