Voltaire's comment - 'I disapprove of what you say, but I will defend to the death your right to say it' - is frequently quoted by defenders of free speech. Yet it is rare to find someone prepared to defend all freedom of speech, especially if the views expressed are obnoxious or obviously false. So where do the limits lie? How important really is our right to freedom of speech? Here, Nigel Warburton offers a concise guide to the important questions facing modern society about free speech: Should a civilized society set limits on the freedom of speech? How can we square free speech with the sensitivities of religious and minority groups? Does copyright law clash with our right to free speech? And how have new technologies such as the Internet changed the debate? This Very Short Introduction is a thought-provoking, accessible, and up-to-date examination of the liberal assumption that free speech is worth preserving at any cost.