"Put shortly and undramatically the case is that a civilization cannot progress without criticism, and must therefore, to save itself from stagnation and putrefaction, declare impunity for criticism. This means impunity not only for propositions which, however novel, seem interesting, statesmanlike, and respectable, but for propositions that shock the uncritical as obscene, seditious, blasphemous, heretical, and revolutionary."

(From George Bernard Shaw’s The Sacredness of Criticism)