Concise, flawless, and forever timely. Free speech ought to be an easy civic concept to grasp. Still, unfortunately, history is rife with examples of people from every political stripe attempting to silence others, not understanding the causal links between speech and genuine violence. If you're on the side of censorship and confident that your arguments are sound, this book is for you. Also, join and support FIRE if you can. They're doing great work to defend free speech rights.
Notable quotes:
"The right to speech and hear-including the right to inform others and be informed about public issues-are inextricably part of that process. The freedom to speak and the freedom to hear are inseparable; they are two sides of the same coin. But the coin itself is the process of thought and discussion. The activity of speakers becoming listeners and listeners becoming speakers in the vital interchange of thought is the 'means indispensable to the discovery and spread of political truth."
-Justice Thurgood Marshall
"There can be no right of speech where any man, however lifted up, or however humble, however young, or however old, is overawed by force, and compelled to suppress his honest sentiments. Equally clear is the right to hear. To suppress free speech is a double wrong. It violates the rights of the hearer as well as those of the speaker. It is just as criminal to rob a man of his right to speak and hear as it would be to rob him of his money."
-Fredrick Douglass
"Both for scientific reasons and for success as a democratic republic, we need to know more, not less about the idea in our fellow humans' heads. I call it my 'Iron Law': it is always important to know what people really believe, especially when the belief is perplexing or troubling. Conversely, in the overwhelming majority of scenarios, you are not safer or better off for knowing less about what people really think."
-Greg Lukianoff