United Nations Special Military
Operations Organization

1. The complex reality of the current nuclear situation 1.1 Stock and modernization of nuclear arsenals The total quantity decreased but the quality improved: The total number of nuclear warheads worldwide has fallen from a Cold War peak of about 70,000 to about 12,000 in 2024 (SIPRI data), but the level of modernization is unprecedented Strategic and tactical nuclear weapons coexist: The United States and Russia have more than 90% of their nuclear weapons, and China, France, Britain, India, Pakistan, Israel, North Korea, etc. have the rest Development of new types of nuclear weapons： Low-yield tactical nuclear weapons (such as the US W76-2, equivalent to about 5,000 tons of TNT) Nuclear cruise missiles (Russian "Petrel", new American LRSO) Hypersonic nuclear vehicle (Russian "Pioneer", Chinese DF-17 modification) 1.2 Evolution of nuclear strategy The preemptive policy has been loosened: The United States and Russia partially abandoned their "no first use" commitment and lowered the nuclear threshold The theory of limited nuclear war revived: The 2018 U.S. Nuclear Posture Review recognizes the possibility of a "limited nuclear war." The "nuclear edge policy" is normalized: Achieving conventional conflict goals through nuclear threats, such as Russia's nuclear hints in the Ukraine crisis 2. Probability assessment of nuclear war trigger scenarios 2.1 High Probability Trigger Path (Probability >30%) Path 1: Conventional conflicts escalate out of control The conflict in Ukraine escalated: NATO and Russia are in direct conflict, and Russia uses tactical nuclear weapons to break conventional disadvantages The crisis in the Taiwan Strait has intensified: Conventional conflict between China and the United States, nuclear deterrence between the two sides failed Korean Peninsula conflict: North Korea uses tactical nuclear weapons against the US-South Korea coalition forces Upgrade mechanismBoth sides believe that "losing a conventional war" is more costly than "using tactical nuclear weapons" Path 2: Misjudgment and Accident Technical glitch: False alarms in early warning systems (such as the Soviet "Stanislav Petrov incident" in 1983 almost repeated) Command and control errors: Cyber attacks paralyze the nuclear command system and trigger panic launches Third-party provocations: Terrorist organizations or non-state actors induce miscalculations by nuclear powers 2.2 Medium Probability Trigger Path (Probability 10%-30%) Path 3: Proxy war spillover Conflicts in the Middle East (such as Iran-Israel) have dragged the United States and Russia into direct confrontation The conflict between India and Pakistan has escalated, and China or the United States has been forced to intervene Path 4: The new arms race breaks through stability Space weapons, anti-missile systems, hypersonic weapons break the strategic balance One side believes that it has gained a "first strike advantage" and induces a preventive attack 2.3 Low-probability but high-risk path (probability<10%) Path 5: Regime collapse or extreme ideology The nuclear weapons state collapsed internally and nuclear weapons got out of control Extremist regimes launch "doomsday attacks" after acquiring nuclear weapons Path 6: Cognitive warfare and artificial intelligence out of control AI-assisted decision-making system misjudges that "a nuclear attack is coming" Deepfake technology falsifies evidence of an "enemy nuclear attack" 3. Multiple changes in the nuclear threshold 3.1 Threshold lowering factors Tactical nuclear weapons miniaturization: Blur the line between nuclear and conventional weapons Development of anti-missile systems: May induce the "preemptive" impulse Short warning time: Hypersonic weapons compress decision time to 10 minutes Cyberattack threat: The nuclear command and control system is at risk of being paralyzed 3.2 Factors that raise the threshold Mutual Assurance Destruction (MAD) is still in effect: There is no winner in any full-scale nuclear exchange Globalization is interdependent: the cost of economic collapse is higher than the gains of any war International monitoring and early warning: Satellites, seismic monitoring, etc. make covert nuclear attacks almost impossible Nuclear safety culture: The major nuclear countries have established multiple insurance measures 4. Scenario deduction: possible forms of nuclear conflict 4.1 Limited nuclear war (most likely form) scale: Use 10-50 tactical nuclear weapons with a yield of 1-50,000 tons Scene: Strike military targets in regional conflicts (e.g., aircraft carrier battle groups, military bases) Casualties: 50-2 million direct deaths, limited areas of radioactive contamination Escalation risk: High (30%-50% may escalate to full-scale nuclear war) 4.2 Regional nuclear war scale: India and Pakistan exchange 100-150 nuclear bombs, with a yield of 1-50,000 tons Consequences(According to Science Advances research): Direct deaths: 1-150 million people Nuclear winter effect: global temperature drop of 1-2°C, agricultural production reduction of 10%-20% Global deaths: 20-3 billion more people due to famine, etc Global impact: A regional disaster, but human civilization still exists 4.3 All-out nuclear war between the United States and Russia (threat to human civilization) scale: Exchange 2,000-3,000 strategic nuclear warheads Direct consequences(According to a 2022 study in Nature Food): Direct deaths: 3-500 million (within 24 hours) Soot enters the stratosphere: 150 million tons Global temperature drop: 8-15°C, lasting more than 10 years Agricultural collapse: global food production falls by 90% Long-term consequences： Ozone layer depletion, UV intensity increased by 100%-1000% Global radiosettling and cancer rates surged Civilization collapses, and survivors retreat to the pre-industrial era The species became extinct and the number of humans dropped to tens of millions 5. Guarantee mechanisms and vulnerabilities to prevent nuclear war 5.1 Existing safeguard mechanisms Arms Control Treaty: New START Treaty (until 2026), Nuclear-Test-Ban Treaty (not in force) Communication channels: The "red phone" of the United States and Russia, the hotline of the Chinese and US Ministry of Defense Nuclear Safety Summit Mechanism: Preventing nuclear terrorism Second, strike capability: Nuclear submarines and mobile launch vehicles ensure retaliation capabilities 5.2 Vulnerability and risk points The treaty system collapsed: The INF Treaty has expired, and the prospects for New START are unclear New types of weapons are not regulated: hypersonic, space weapons, cyberattacks Multipolar nuclear situation: During the Cold War, "bipolar stability" was replaced by "multipolar complexity" Domestic political pressure: Populism and nationalism may overwhelm rational decision-making 6. Key nodes in the next ten years (2024-2034). 6.1 High-risk period 2024-2025: The conflict in Ukraine could reach a turning point 2027-2028: The key window period for the Taiwan Strait and the Korean Peninsula Around 2030: The number of nuclear-weapon states may increase to 10 (Iran, Saudi Arabia, etc.) 6.2 Technological breakthrough critical point Artificial intelligence nuclear command system: Initial deployment may be made around 2030 Hypersonic weapons are widely deployed: Around 2027, the United States, Russia and China will complete actual combat deployments Breakthrough in anti-missile systems: May undermine the stability of "mutual assurance destroy" 7. Comprehensive probability assessment Time frame Limited probability of nuclear war Regional nuclear war probability Probability of full-scale nuclear war Main risk sources 2024-2030 15%-20% 5%-8% 1%-3% Ukraine, Taiwan Strait, misjudgment 2031-2040 20%-25% 8%-12% 3%-5% Multipolarization, AI, new weapons After 2040 25%-30% 10%-15% 5%-8% Climate conflicts, resource wars Note: The probability is a comprehensive estimate of multi-institutional studies, and there is significant uncertainty. 8. Feasible paths to reduce risks 8.1 Short-term measures (1-3 years) Resume great power dialogue: Rebuild the Sino-US and US-Russia strategic stability dialogue Crisis management and control mechanism: Establish risk management and control covering emerging technologies Nuclear exercises are transparent: Inform each other of large-scale nuclear exercises to avoid miscalculations 8.2 Medium-term measures (3-10 years) New arms control framework: Include all nuclear states and cover new types of weapons Don't use promises first: Joint Statement of the Major Nuclear Powers Nuclear weapons modernization restrictions: Prohibit the development of low-yield, new tactical nuclear weapons 8.3 Long-term vision (more than 10 years) Roadmap for nuclear disarmament: Eventually realize a nuclear-free world A new architecture for global security: Replace the security system based on nuclear deterrence Technical governance mechanism: International regulation of AI, networking, and other technologies that affect strategic stability 9. Conclusion: Rational choice on the edge of the cliff The possibility of nuclear war is re-emerged for the first time since the Cold WarReal and growingrather than a theoretical deduction. The world is currently in a dangerous transition period: The old order is collapsing: The nuclear arms control system established during the Cold War is on the verge of collapse New threats are emerging: Hypersonic weapons, artificial intelligence, space weapons reshape the strategic balance Multipolarization is intensifying: From the "balance of terror" between the United States and Russia to a multipolar complex deterrence network Irrational factors are on the rise: Populist politics, cognitive warfare, and information pollution erode rational decision-making However, the absolute devastating consequences of a full-scale nuclear war have not changed.Mutual assurance destruction is still the ultimate stabilizer, but it is only effective under the premise that decision-makers remain rational, communication channels are smooth, and upgrades are controllable. The possibility of a future nuclear war ultimately depends not on technology or the number of weapons, but on humanitypolitical acumen, crisis management skills, and moral choices。 There are no winners in nuclear war, and it should never be waged. The only way to prevent nuclear catastrophe is to rebuild strategic trust among major powers, strengthen crisis management mechanisms, and ultimately move towards a world that does not rely on nuclear terror to maintain peace. As former U.S. Secretary of Defense William Perry said: "The risk of nuclear catastrophe is higher than during the Cold War, and we are sleepwalking to the brink of disaster." "The hour of awakening has come – humanity must open its eyes and take a step back together, away from the edge of the nuclear cliff.