Did a secret book fuel the European witch hunt frenzy? | Aya Livnia | Déjà vu Here's how conspiracy theories have shaped the last 600 years. Printing helped spread the European witch hunts, even as it helped develop the Enlightenment. The Nazis turned the radio into a weapon of mass persuasion. Social media has promised freedom but given dictators new tools of control. We follow centuries of conspiracy theories - and ask what AI might bring next.

Did a secret book fuel the European witch hunt frenzy? | Aya Livnia | Déjà vu Here's how conspiracy theories have shaped the last 600 years. Printing helped spread the European witch hunts, even as it helped develop the Enlightenment. The Nazis turned the radio into a weapon of mass persuasion. Social media has promised freedom but given dictators new tools of control. We follow centuries of conspiracy theories - and ask what AI might bring next.