Time front cover after the Pentagon Papers were leaked - highlighting the deception, and self-deception, of the Vietnam War. It is 50 years since I read Hannah Arendt’s essay on ‘Lying in Politics’. The essay was prompted by the unauthorised release of the Pentagon Papers, a classified documentary history of US policy-making in the Vietnam War. What shocked many at the time was the evidence that while Lyndon Johnson’s administration continued to tell the American people that its strategy was working, despite the accumulating casualties, top officials knew it was failing. Much of the commentary surrounding the release of the papers, including Arendt’s, turned on the role of deception and self-deception.