The past several years have done a lot to expose the failings of the "marketplace of ideas", as disinformation and harassment campaigns have shown an ability to spread and flourish despite ample amounts of counterspeech. This triumph of mob behavior, especially on Twitter, has challenged a lot of people's preconceptions about how free speech functions, and one person who has been exploring these issues is FIRE's Sarah McLaughlin, especially in two topical articles on her Substack. She joins us on this week's episode to discuss Twitter, free speech, and the challenge mob behavior presents to online discourse.