Here is another form of deterrence which, while not a Doomsday Machine, is still an"ultimate" of a sort. This could be called the Homicide Pact Machi… - Herman Kahn

The easiest way in which one can put unintentional strains on the enemy is to have a force which looks "trigger-happy." The one circumstance under which almost all Soviet experts agree the Russians might strike is the one in which they feel they are anticipating a strike by us. It will be difficult for them to read our intentions. They will doubtless err on the side of caution. But it is not clear which side will look cautious, particularly if there is a crisis which creates apprehension. It will add a real element of stability if our posture is such that we do not look as if we have to be "trigger-happy" in order to survive. This is an important reason for not relying solely on quick reaction as a protection and for not having forces so vulnerable that we could lose most of them from a Russian first strike. Under some circumstances our vulnerability to a Russian first strike would both tempt the Russians to initiate a war and at the same time compel them, because they might feel that we would be tempted to pre empt for our own protection. If we are sufficiently vulnerable they might find it impossible to believe that we were willing, in this crisis to rely on their good will, morality; caution, or sense of responsibility as a protection.

In addition to the obvious dangers, there is another subtle but by no means minor disadvantage to a pure deterrence posture: the threat of mutual suicide is a very uninspiring concept, no matter how logical it may seem. If it happened to involve explicitly the annihilation of all humanity it would also be totally immoral; one doubts if it could long remain an important part of United States policy.

In any case, the thought of a catastrophe or holocaust unleashed by accidental (i.e. nonhistorical) causes might be very unsettling to any Marxists who had a passionate belief in a deterministic theory of history. Instead of saying "It is inevitable that we will take over the world in fifty years", this Marxist would have to add, "Always assuming some capitalist fool doesn't press the button."