In the United States today, the right to free speech is enshrined in the Constitution, but that doesn’t mean everyone agrees on what it looks like in practice. On Ian Explains, Ian Bremmer opens with a landmark case: when neo-Nazis won the right to march through a Holocaust survivor community in Skokie, Illinois. The decision was controversial but helped define modern free speech as “ugly, uncomfortable, and messy,” yet fundamental to American democracy. Today, that foundational idea is once again being tested—on college campuses, in immigration courts, and in the rhetoric of both political parties.