Since the dawn of the nuclear age, and especially since nuclear weaponry was wedded to ballistic means of delivery across intercontinental ranges, a major (some would agree the major) goal has been the avoidance of strategic nuclear war between the United States and the Soviet Union
While we may disagree with the implications of what strategy deters, a nuclear strategy must deal with the real emergence of an uncertainty in the strategic environment. Strategies and patterns of force must flow from a concept of what deters, given the physical environment, and must be devised and procured relevant to current and future realities