Almost all libertarians earnestly say, "I believe in free speech." Normally, though, this goes way beyond the right to speak freely. Most libertarians also believe that free speech "works" in some sense - that given a free exchange of ideas, the truth will at least ultimately prevail.On reflection, this is an awkward position. Western countries don't have completely free speech, but they are amazingly close to this extreme. Furthermore, the anonymity of the internet makes it easy to evade most of the lingering restrictions on free expression. And yet, as you may have noticed, libertarianism has failed to become popular. Which raises an awkward question: If free speech yields truth, then shouldn't we
Bryan Caplan considers the following as important: cost-benefit analysis
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