In any event, such a deterrent function does not require that the reaction to a nuclear attack should be instantaneous, and giving up the possibility of an instantaneous reaction has the great benefit of practically eliminating the danger of accidental nuclear war. Accompanying the physical implementation of "zero alert" postures should be unilateral commitments of no-first-use and no threat of use of nuclear weapons by all nuclear-weapon states, pending early conclusion of a treaty to this effect.