Most liberal societies are deeply committed to a principle of free speech. At the same time, however, there is evidence that some kinds of speech are harmful in ways that are detrimental to important liberal values, such as social equality. Might a genuine commitment to free speech require that we legally permit speech even when it is harmful, and even when doing so is in conflict with our commitment to values like equality? Even if such speech is to be legally permitted, does our commitment to free speech allow us to provide material and institutional support to those who would contest such...