Comment: Disintegration of the Soviet Union and the threat of nuclear proliferation. (1992, 20 Marks)
When the Soviet Union dissolved on 26 December 1991, an arsenal of some 30,000 warheads lay across four new states. It remains the only time a nuclear power has fragmented. In 1992 the fear was a “loose nukes” cascade of new nuclear states, stolen material and scientists for hire. That it was largely not realised was a policy achievement, not a natural outcome.
The dimensions of the threat
| Successor state | Strategic inheritance |
|---|---|
| Russia | The bulk of the arsenal, with the command and production systems |
| Ukraine | About 1,900 warheads, the world’s third-largest arsenal on paper |
| Kazakhstan | About 1,400 warheads and the Semipalatinsk test site |
| Belarus | About 80 warheads |
- Successor proliferation: launch codes stayed in Moscow, but custody and political claims did not.
- Fissile material: hundreds of tonnes of highly enriched uranium and plutonium sat in poorly guarded sites with incomplete accounting.
- Brain drain: tens of thousands of unpaid weapons scientists were a market for would-be proliferators.
- Leakage and export controls: seizures of weapons-usable material in Munich and Prague (1994) proved smuggling real, while controls fragmented across a dozen jurisdictions.
How the threat was contained
- Lisbon Protocol (23 May 1992): Ukraine, Kazakhstan and Belarus became parties to START I and pledged to join the NPT as non-nuclear-weapon states.
- Budapest Memorandum (5 December 1994): the US, UK and Russia gave security assurances, not guarantees, to respect their independence and borders. The last warheads reached Russia in 1996.
- Nunn–Lugar Cooperative Threat Reduction (1991) funded deactivation and security; Project Sapphire (1994) airlifted about 600 kg of HEU out of Kazakhstan; Megatons to Megawatts (1993) turned weapons uranium into reactor fuel; the International Science and Technology Centre employed scientists in civilian work.
- Supply-side tightening: the NSG adopted dual-use guidelines in 1992, and the US invoked the MTCR to sanction ISRO and Glavkosmos that year, blocking the transfer of cryogenic engine technology to India; only finished engines were supplied.
The theoretical debate
In 1993 John J. Mearsheimer made “The Case for a Ukrainian Nuclear Deterrent”: only weapons could deter a revanchist Russia. Steven E. Miller replied in the same journal that a Ukrainian arsenal would provoke Moscow, isolate Kyiv and invite accidents. Liberal institutionalists backed disarmament through treaties and reassurance, and Ukraine’s choice also fits Scott D. Sagan’s norms model: renunciation bought recognition and aid.
The verdict in hindsight
- Success: no successor state kept weapons, no warhead is known to have been lost, and three new non-nuclear members eased the NPT’s indefinite extension in 1995. Kazakhstan went on to anchor a Central Asian nuclear-weapon-free zone (2006) and host the IAEA’s low-enriched uranium bank.
- Costs: Russia annexed Crimea (2014) and invaded Ukraine (2022), breaching its assurance. With Libya’s fate, this teaches would-be proliferators that weapons, not promises, deter. Since 2023 Russia has stationed tactical nuclear weapons in Belarus, and the Oreshnik missile followed in late 2025, reversing Belarus’s denuclearisation in practice.
- India: the loss of its Soviet partner, whose 1971 treaty gave way in January 1993 to one without a security clause, followed by the NPT’s extension and the CTBT, narrowed India’s options and fed the May 1998 tests.
- Unfinished business: Russia holds the largest inventory (about 5,420 warheads, SIPRI 2026), and New START expired in February 2026 without a successor.
Conclusion
The disintegration posed the gravest proliferation threat in history, and cooperative threat reduction contained it. Yet the settlement rested on assurances, and their breach in Ukraine has made the case against nuclear renunciation stronger than at any time since 1991.