I discovered this book through Warburton's enjoyable and thought-provoking Philosophy Bites podcasts (produced with David Edmonds), and have also read his excellent Philosophy: The Basics. Like that book, this short overview of free speech provides a superb summary of the key issues in clear, non-technical language. It is divided into five chapters, plus a conclusion:
Chapter one briefly demonstrates the importance of free speech, but also shows how even free speech advocates have to draw the line somewhere and that simply declaring you are 'in favour of free speech' is a fairly meaningless statement.
Chapter two focuses on John Stuart Mill's influential book On Liberty and examines how his ideas relate to contemporary issues such as the libel case brought against Deborah Lipstadt by discredited historian David Irving.
Chapter three examines how far we should go in tolerating criticism of religion, and whether blasphemy deserves to be legislated against or if it is ultimately justified, from an atheist perspective, as an essentially victimless crime.
Chapter four deals with the tricky case of pornography, and whether it can even be considered a type of speech, and therefore deserving of protection. Warburton goes into quite a lot of depth here, and gives both sides of the argument a fair hearing.
Finally, chapter five looks at how the Internet has changed everything, for better or worse. By posting this review up on this website I am exercising my right to freely express my views to a potentially huge audience, but do I deserve that right when I can do so anonymously, without fear of serious rebuke or being subject to much in the way of quality control? A quick glance around any reviews site such as this or, for example, the comments section of a national newspaper, and it fast becomes apparent that sheer quantity of opinions frequently makes it difficult or even impossible for quality thoughts and ideas to be heard above the cacophony.
At just over a hundred pages long, it is certainly rather brief and I felt that perhaps there were still a few important issues left undiscussed that could have been squeezed in without compromising the nature of a short introduction. For example, the debate over climate change seems to be one of the most important of our time, and where to draw the line between allowing legitimate criticism of the science on the one hand, and censoring potentially devastating propaganda on the other, is an issue that affects us all and one that I would have liked to have seen given at least a passing mention.
This is the first book I've read on free speech, so I can't comment on how it compares to any others of a similar theme, but like many releases in the OUP Very Short Introduction series it provides a well-researched and balanced overview of the subject, presented in very readable language that nevertheless doesn't feel dumbed-down. If everyone devoted only a couple of hours to reading it and giving it some thought, the world might just be a saner place. Highly recommended.