People said it because other people said it. They did not know why it was being said and heard everywhere. They did not give or ask for reasons. 'Reason,' Dr. Pritchett had told them, 'is the most naive of all superstitions.' 'The source of public opinion?' said Claude Slagenhop in a public radio speech. 'There is no source of public opinion. It is spontaneously general. It is a reflex of the collective instinct of the collective mind.