This consists merely of reckoning the enemy propaganda as part of the psychological warfare situation, and of using the enemy as part of the background to your own advantage. The moment you start letting him take the initiative, your propaganda wags along behind his. Tell _his_ people something _he_ can't deny. Let him sit up nights worrying about how he will counteract _you_. Make him drive his security officers crazy trying to release figures that will please your G-2 in order to reassure his home audience. Really good propaganda does not worry about counterpropaganda. It never assumes that the enemy propagandist is a gentleman: he is by definition a liar. Your listeners and you are the only gentlemen left on earth.
World War I saw psychological warfare transformed from an incidental to a major military instrument, and later it was even called the weapon which won the war. The story spread, since the Germans liked to imagine that they had been talked out of winning, and since ex-propagandists among the Allies enjoyed thinking that their own cleverness had been decisive when even the tremendous violence of trench warfare had produced nothing more than a stalemate. If psychological warfare is considered in the broad sense, it seems plain that it was among the decisive weapons of 1914-1918. The political decency of the Allies, the appeal of President Wilson's Fourteen Points, the patent obsolescence of the Kaiser and what he stood for, the resurgence of Polish, Baltic, Finnish, Czechoslovak and South Slav nationalisms--all these played a real part in making Germany surrender in 1918. More real than the role of guns, men, ships, planes, tanks? This cannot be answered: it is like asking of a long-distance runner whether his heart, lungs, legs, or head contributed most to his success. Since war is waged by and against all parts of the human personality--physical condition, skills, intelligence, emotions, and so on--it is impossible to distinguish between the performance of one kind of weapon and the other in the attainment of a goal itself complex--governmental surrender. Only a weapon which left no enemy survivors could claim for itself undisputed primacy in victory.