In an era of political correctness, race-baiting, terrorist incitement, the 'Danish' cartoons, the shouting down of speakers, and, of course, 'fake news, ' liberals and conservatives are up in arms both about speech and its excesses, and what the First Amendment means. Speech has been weaponized. Everyone knows it, but no one seems to know how to make sense of the current confusion, and what to do about it. Thane Rosenbaum's provocative and compelling...