circles. Military historians characterized "An Introduction to Strategy" as the most complete strategy treatise published in that generation. The Vatican analyzed the papers extensively at the fourth session of Vatican Council II in 1966 and later commented on them in the "Pastoral Constitution on the Church in the Modern World." Beaufre defined nuclear deterrence as the only kind of deterrence that produces the effect seeks to avoid or to end war. Beaufre developed "Deterrence and Strategy" in the context of the bipolar world of the Cold War where the threat of nuclear war was effective. The existence of this threat caused a psychological result and prevented adversaries from taking up arms. Adversaries had to measure the risk they were running if they unleashed a crisis, because the response would have produced political, economic, social, and moral damage from which recovery wouldn't have been easy; material damage and psychological factors played a decisive role in deterrence. Beaufre believed that military action should be avoided in a nuclear scenario and that victory should be won by paralyzing the adversary through indirect action. It is not simply a matter of terrifying the enemy; it is also a matter of hiding one's own fear by executing those actions that show the opposite. This equilibrium-through-terror axiom ruled during the Cold War and prevented a nuclear confrontation between the United States and the Soviet Union. For Beaufre, deterrence was above all the threat of nuclear war. The atomic threat guaranteed peace better than conventional arms did. Of course Beaufre saw the problem principally from the French strategic viewpoint. He was not convinced by conventional deterrence: "The classical arms race creates instability, just as the nuclear race creates stability." Beaufre's thesis, that the threat of using atomic weapons is the only means for worldwide stabilization, is pessimistic. His pessimism lies in the contradictions between nuclear and conventional deterrence. When one party develops greater offensive capability than another, instability results. Victory in a conventional war is unilateral; in a nuclear war, destruction is bilateral. The simple expectation of success by one party can unleash aggression in his adversary. Beaufre develops this idea in more detail in a theory called "the dialectic of the expectations of victory." Classical deterrence Beaufre's thought is not restricted to a defence of nuclear deterrence. Elsewhere in his treatise he reflects on the possibility of combining nuclear deterrence with conventional deterrence. He summarizes his