For twenty-some years, Naomi Klein has been a leading thinker on the left. She’s especially known for the idea of disaster capitalism: an analysis that the forces of big business will exploit any severe disruption to take over more space in our lives. She was often confused with another prominent political writer, Naomi Wolf—once a feminist on the left who has, in recent years, embraced conspiracy theories on the right and is now on good terms with Steve Bannon. Klein’s new book, “Doppelganger,” starts with this simple case of mistaken identity and broadens into an analysis of our political moment, which she describes as “uncanny” in the psychological sense. “Freud described the uncanny as that species of frightening that changes what was once familiar to something unfamiliar,” she tells the staff writer Jia Tolentino. “It’s that weirdness of ‘I think I know what this is, but it’s not what I think.’ ” Klein argues that the left and the right have become doppelgangers of one another—and that denialism regarding climate change has widened to any number of topics, including the claim that Joe Biden is dead and is being played by an actor. “Whenever you don’t like reality, you can just say that it’s not real,” she says.