The promise of the internet was that it would be a tool to melt barriers and aid truth-seekers everywhere. But it feels like polarization has worsened in recent years, and more internet users are being misled into embracing conspiracies and cults. From QAnon to anti-vax screeds to talk of an Illuminati bunker beneath Denver International Airport, Alice Marwick has heard it all. She has spent years researching some dark corners of the online experience: the spread of conspiracy theories and disinformation. She says many people see conspiracy theories as participatory ways to be active in political and social systems from which they feel left out, building upon beliefs they already harbor to weave intricate and entirely false narratives. Marwick speaks with EFF’s Cindy Cohn and Jason Kelley about finding ways to identify and leverage people’s commonalities to stem this flood of disinformation while ensuring that the most marginalized and vulnerable internet users are still empowered to speak out.