Summary: Seana Shiffrin is Professor of Philosophy and Pete Kameron Professor of Law and Social Justice at UCLA. She defends the “thinker theory” of freedom of speech, which holds that a central reason for upholding a moral and legal system of free speech is that such a system is necessary for free thought and reflective action. This view is articulated in her book, Speech Matters:On Lying, Morality, and the Law (Princeton 2014).
