“The thing that really is trying to tyrannize through government is Science. The thing that really does use the secular arm is Science. And the creed that really is levying tithes and capturing schools, the creed that really is enforced by fine and imprisonment, the creed that really is proclaimed not in sermons but in statues, and spread not by pilgrims but by policemen—that creed is the great but disputed system of thought which began with Evolution and has ended in Eugenics. Materialism is really our established Church; for the government will really help it to persecute its heretics…I am not frightened of the word ‘persecution’…It is a term of legal fact. If it means the imposition by the police of a widely disputed theory, incapable of final proof—then our priests are not now persecuting, but our doctors are.”