'We are not, however, the first generation to confront the challenge of authoritarian propaganda. And as I looked for past experiences to inform our own, I discovered a British second world war media operation that managed to engage huge audiences who had been loyal to the Nazis and undermine their faith in Hitler’s regime. If we think reaching people in “echo chambers” today is tough, think about how hard it was to persuade Germans to trust the people who were literally trying to kill them.'
