The new documentary No Safe Spaces, starring conservative thinker, radio host, and writer Dennis Prager and liberal, comedian, and podcast host Adam Carolla, is a must-see for anyone concerned with the long-term viability of the First Amendment's free speech protections. While primarily focusing on the hostility to free speech laying siege to America's college campuses, vividly illustrated with compelling clips of violent protests and civil unrest by students from Berkeley to Yale, No Safe Spaces powerfully illustrates how the movement to limit speech has moved into mainstream arenas as well. Prager and Carolla recognize that "common sense and values" are...