The internet was designed to be a kind of free-speech paradise, but a lot of the material on it turned out to incite violence, spread untruth, and promote hate. Over the years, three American behemoths--Facebook, YouTube and Twitter--became the way most of the world experiences the internet, and therefore the conveyors of much of its disturbing material.

What should be done about this enormous problem? Should the giant social media platforms police the content themselves, as is the norm in the U.S., or should governments and international organizations regulate the internet, as many are demanding in Europe? How do we keep from helping authoritarian regimes to censor all criticisms of themselves? David Kaye, who serves as the United Nations' special rapporteur on free expression, has been has been at the center of the discussions of these issues for years. He takes us behind the scenes, from Facebook's "mini-legislative" meetings, to the European Commission's closed-door negotiations, and introduces us to journalists, activists, and content moderators whose stories bring clarity and urgency to the topic of censorship. Speech Police is the most comprehensive and insightful treatment of the subject thus far, and reminds us of the importance of maintaining the internet's original commitment to free speech, free of any company's or government's absolute control, while finding ways to modulate its worst aspects.