Those who were active in the civil-rights movements of the ‘New Left’ in the Sixties and Seventies understood that free speech is the linchpin of all other struggles for equality. But today it is mostly well-intentioned activists on the left who are calling on the state to constrict the Overton window. Worse still, in a world in which social media have become the de facto public square, and online platforms are controlled by powerful likeminded CEOs, we are left with the paradoxical phenomenon of self-identified leftists seeking to empower huge corporations to set the parameters of acceptable thought.