A masterpiece. This should be required reading for every university professor.

Peter Boghossian, Assistant Professor of Philosophy, Portland State University, USA and author of 'A Manual for Creating Atheists'

As the Right devolves into barbaric know-nothingism and the Left becomes a censorious, perpetual offense machine, Russell Blackford reminds us that our greatest source of political virtue and strength is our liberal heritage. At a time when crucial questions of civil discourse, free-speech, and democracy have become tools in a bloody fight between ideologues and hyper-partisans, Blackford brings to them a careful examination of specific cases and a learned consideration of some of the key texts in classical liberal philosophy. Rigorous, readable, and on the side of the angels, Tyranny of Opinion represents the entry of one of our most thoughtful and talented public intellectuals into what is arguably the central cultural conflict of our day.

Daniel A. Kaufman, Professor of Philosophy, Missouri State University, USA