Discuss the theory of Nuclear Deterrence. Did Nuclear Deterrence prevent a superpower war? (2015, 15 Marks)
Nuclear deterrence is the prevention of an adversary’s action by convincing him in advance that its cost will exceed any gain. Within months of Hiroshima, Bernard Brodie (The Absolute Weapon, 1946) concluded that the chief purpose of military establishments was no longer to win wars but to avert them. The theory built on that reversal explains much of the Cold War, though not all of it.
The theory
- Three requirements: capability to inflict unacceptable damage, credibility that the threat will be carried out, and communication so the adversary reads it correctly.
- Second-strike survivability. Albert Wohlstetter’s “delicate balance of terror” (1959) showed that only forces able to survive a first strike deter; hence hardened silos, bombers on alert and missile submarines.
- Doctrinal evolution. John Foster Dulles’s massive retaliation (1954) lacked credibility against small provocations; flexible response (NATO, 1967) added graduated options; once both sides had assured second strikes, the condition became mutual assured destruction (MAD).
- Types. Punishment versus denial; general versus immediate deterrence, Patrick M. Morgan’s distinction; direct versus extended. The American umbrella over Western Europe was meant to deter not only nuclear attack but Soviet conventional aggression against allies.
- Bargaining. Thomas C. Schelling treated the power to hurt as bargaining power, with credibility built through commitment and the threat that leaves something to chance.
- Proliferation optimism. Kenneth N. Waltz (1981) argued that because nuclear weapons make the costs of war certain, leaders turn cautious, so more may be better.
Did it prevent a superpower war?
Yes, substantially.
- No direct US–Soviet war occurred in four decades of rivalry, the “long peace” of John Lewis Gaddis (1986).
- At the brink, in Berlin (1961) and Cuba (1962), both leaderships backed away; Hiroshima and Nagasaki had made the cost concrete.
- Robert Jervis (The Meaning of the Nuclear Revolution, 1989) argued that mutual vulnerability made victory meaningless between secure second-strike powers.
But the claim has limits.
- Proxy wars in Korea, Vietnam and Afghanistan show Glenn H. Snyder’s stability–instability paradox: peace at the top licensed violence below it.
- Near-misses suggest luck: Vasili Arkhipov withheld consent for a nuclear torpedo in 1962; Stanislav Petrov dismissed a false launch warning in 1983, the year Able Archer alarmed Moscow.
- Rival explanations. John E. Mueller (1988) held that the horror of conventional war already made great-power war obsolete. Nina Tannenwald’s nuclear taboo (2007) explains American non-use in Korea and Vietnam, against adversaries who could not retaliate, which deterrence cannot.
- Unprovable success. A war that did not happen cannot be credited to a single cause.
Conclusion
Nuclear deterrence was the most important single factor behind the absence of a superpower war, working alongside norms, prudent leadership and luck. India’s own doctrine of credible minimum deterrence drew the lesson that a small survivable force suffices. The test now is harder: New START expired on 5 February 2026, and deterrence must hold in a three-way rivalry with China.