The alternate histories and possible futures of nuclear weapons (with Carl Robichaud)
Spencer Greenberg speaks with Carl Robichaux about the history, development, and present threat of nuclear weapons. They discuss the risks of nuclear war, the challenges of disarmament, and strategies to reduce global nuclear dangers.
Deep Dive Analysis
17 Topic Outline
Assessing historical luck with nuclear weapons use
Actual deaths vs. expected value of nuclear war
Nuclear weapons as a deterrent for major wars
The surprising rarity of nuclear weapon states
Debating "all countries with nukes" argument and failure modes
Historical close calls: Petrov and Arkhipov's interventions
India's nuclear motives and preventing proliferation
Iran's nuclear ambitions and international response
Differentiating nuclear energy and weapons technology
Verifying nuclear programs and arms control treaties
Evolving ease of building nukes and terrorism threats
Key interventions for global nuclear safety
Citizen and NGO roles in nuclear policy
Current elevated risks in nuclear landscape
Understanding nuclear winter and extinction risks
Re-evaluating Hiroshima and Nagasaki bombings
Mitigating short timelines in nuclear decision-making
7 Key Concepts
Expected Value (of nuclear war)
This concept weighs the probability of an event, like nuclear war, by its potential consequences, such as deaths. Even a low probability of a catastrophic nuclear event can result in a very high expected value of deaths, suggesting that the actual historical outcome of few nuclear-related deaths has been exceptionally lucky.
Nuclear Winter
A theory suggesting that a large-scale nuclear war would inject vast quantities of soot high into the stratosphere. This soot would block sunlight, leading to widespread crop failures and potentially shrouding the Earth in darkness for an extended period, causing devastating secondary climate effects.
Nuclear Non-Proliferation Regime
An international framework comprising treaties, rules, laws, and export control agreements aimed at preventing the spread of nuclear weapons technology and materials to additional countries. It relies on verification measures often carried out by the International Atomic Energy Agency (IAEA).
Enrichment (Nuclear Fuel Cycle)
The process of increasing the concentration of uranium-235 in natural uranium. Enriching uranium to about 4% makes it suitable for nuclear reactor fuel, while enriching it to over 90% creates weapons-grade material for nuclear bombs, often using similar equipment.
Reprocessing (Nuclear Fuel Cycle)
A chemical process used to separate plutonium from spent or used nuclear fuel that has been removed from a reactor. Plutonium is a highly energy-dense material that can be utilized in certain types of nuclear reactors or, more critically, as fissile material for nuclear bombs.
Nuclear Sufficiency
The doctrine that a nation possesses an adequate number of nuclear weapons to deter any adversary from launching an attack, even after absorbing a first strike. It implies that further expanding the nuclear arsenal does not significantly enhance deterrence and may instead increase overall risk.
Secure Second Strike Capability
The ability of a country to launch a retaliatory nuclear strike even after enduring a devastating first strike from an opponent. This capability, often ensured by assets like undetectable submarines, reduces the pressure for a rapid, potentially error-prone 'launch on warning' response.
13 Questions Answered
The historical outcome of relatively few deaths from nuclear weapons appears to be incredibly lucky, as the expected value of deaths from near-misses during the Cold War was dramatically higher than what actually occurred. While a large-scale nuclear war might not be the most frequent outcome in alternate histories, the potential consequences are so catastrophic that the average outcome is still horrific.
While the physical weapons can be eliminated, the knowledge of how to build them and the laws of physics that permit their existence cannot be undone. A world without nuclear weapons would still be one where the potential to build them exists, requiring strong international cooperation to prevent re-proliferation.
This is surprising and not the most likely outcome. Factors include superpowers offering protection to allies in exchange for not pursuing their own programs, the strengthening of the non-proliferation regime after India's test, and the high cost and difficulty of developing weapons amidst international scrutiny.
The more countries that possess nuclear weapons, the more dangerous the world becomes. Each new nuclear state introduces new competitive relationships, increased opportunities for miscalculation, technical errors, and the risk of a "madman" leader, making nuclear use more likely.
Stanislav Petrov, a Soviet lieutenant colonel, disregarded protocols in 1983 by not reporting a false radar warning of five incoming US warheads, believing it to be an error. Vasily Arkhipov, a Soviet naval commander, prevented the launch of a nuclear torpedo during the Cuban Missile Crisis by halting his captain's order. Both acted against orders based on their judgment, averting potential nuclear escalation.
Primary motivators include acute security concerns, a desire for international status (noting that UN Security Council permanent members are also original nuclear powers), and domestic bureaucratic or political factors. There can also be a sunk cost fallacy after investing heavily in a program.
Nuclear reactors themselves pose little proliferation risk. The dangerous parts are "enrichment" (making nuclear fuel, which can be enriched to weapons-grade) and "reprocessing" (isolating plutonium from spent fuel). If these processes are controlled internationally, nuclear energy can be de-linked from weapons development.
IAEA inspectors visit declared facilities, look for unaccounted material, and can take samples to detect specific isotopes that indicate weapons-related activity. Modern safeguards also allow for more intrusive inspections and satellite monitoring, but ultimately, if a country is determined to hide a program, it's very challenging to detect.
Yes, generally. Advances in manufacturing technology, software, and AI make it possible to achieve the same level of production as the Manhattan Project with smaller teams, less geography, and less money. However, detection technology is also improving, creating a cat-and-mouse dynamic.
Key interventions include conducting fail-safe reviews of nuclear systems, keeping lines of communication open between nuclear powers, avoiding the deployment of high-risk nuclear systems (like ambiguous short-flight missiles), and returning to a policy of nuclear sufficiency rather than engaging in new arms races.
Citizens can create political space for leaders to engage in dialogue with adversaries without punishment, express their concerns to elected officials, and support non-governmental organizations (NGOs) and academic institutions that audit conventional wisdom, provide new ideas, and advocate for better nuclear policies.
While initial estimates in the 1980s had flaws, the core mechanism of nuclear winter — soot lofted into the stratosphere causing climate disruption — has been validated by subsequent climate models. It's a concern, but the extent of its impact depends on many variables like weapon use, soot amount, and atmospheric residence time.
Historians debate this. While Japan was largely defeated and the Soviet Union was about to enter the war, some "bitter enders" might have continued fighting. The US likely used the bombs to save American lives, end the war quickly, and demonstrate its new technology to shape the post-war order. The second bomb on Nagasaki, however, might have been avoidable given ongoing surrender discussions.
18 Actionable Insights
1. Conduct Nuclear Fail-Safe Reviews
Implement comprehensive fail-safe reviews in all nuclear-armed countries to ensure weapon safety and exercise extreme caution around the entanglement of conventional and nuclear forces. This helps understand how advanced technologies might inadvertently threaten adversaries.
2. Maintain Open Nuclear Communication
Keep lines of communication open between nuclear powers, such as the US and Russia, to manage nuclear weapons as a shared threat to civilization. This cooperation is essential despite other geopolitical differences.
3. Increase Nuclear Decision Time
Invest in robust command and control systems and ensure rapid, accurate information gathering to increase the time leaders have to make critical nuclear decisions. This reduces the risk of rash actions under extreme pressure.
4. Reduce ICBM Reliance
Consider removing intercontinental ballistic missiles (ICBMs) from arsenals, as they contribute to short decision timelines and increase pressure for rapid response. Submarine-launched ballistic missiles (SLBMs) offer a secure second-strike capability without the same time pressure.
5. Avoid High-Risk Nuclear Systems
Refrain from developing and deploying nuclear systems with short flight times, ambiguous targets, or unclear warhead types (conventional vs. nuclear). These characteristics make systems highly risky and escalatory.
6. Adopt Nuclear Sufficiency Policy
Embrace a policy of nuclear sufficiency, where a nation maintains enough weapons to deter adversaries without engaging in costly and risky quantitative or qualitative arms races. This approach reduces global risk and saves resources.
7. Limit Nuclear Weapon States
Actively work to prevent more countries from acquiring nuclear weapons, as each new nuclear state increases the likelihood of nuclear use. This is due to new competitive relationships and potential for miscalculation or technical error.
8. Control Enrichment and Reprocessing
Focus non-proliferation efforts on controlling uranium enrichment and plutonium reprocessing facilities, as these are the dangerous parts of the nuclear fuel cycle directly linked to bomb-making. This is more critical than merely controlling basic nuclear reactors.
9. Secure Nuclear Materials Globally
Prioritize securing all weapons-usable nuclear material worldwide to prevent theft or diversion by non-state actors. Special attention should be paid to addressing the “insider threat” within existing nuclear states.
10. Sanction Nuclear Proliferators
Ensure that states acquiring nuclear weapons in violation of international commitments face significant negative consequences, such as economic constraints. This deters other countries from following suit.
11. Employ Carrot and Stick Diplomacy
Use a combination of incentives (carrots) and disincentives (sticks) in negotiations, such as the Joint Comprehensive Plan of Action (JCPOA), to constrain nuclear programs and prevent proliferation. This approach can be more effective than just pressure.
12. Establish International Fuel Banks
Support the creation and use of international fuel banks and consortia to provide enriched nuclear fuel and manage spent fuel. This reduces the need for individual countries to develop their own risky enrichment and reprocessing capabilities.
13. Invest in Nuclear Detection & Governance
Continuously invest in advanced detection technologies and robust international governance systems to identify and intervene against clandestine nuclear weapons development. This is crucial as the ease of building bombs increases over time.
14. Support Dialogue with Adversaries
Create political space and avoid punishing politicians who engage in dialogue with adversaries, especially on nuclear issues. Such communication is vital for preventing nuclear war.
15. Support Non-Governmental Nuclear Experts
Fund and support non-governmental organizations (NGOs) and academic experts in the nuclear field. These groups audit conventional wisdom, provide new ideas, and increase transparency in nuclear policies, leading to better outcomes.
16. Donate to Nuclear Philanthropy
Contribute to philanthropic organizations focused on nuclear issues, such as the Plowshares Fund or Longview Philanthropy. This supports experts working to reduce nuclear risks without requiring personal expertise in the field.
17. Think in Expectation for Nuclear Weapons
Evaluate the overall impact of nuclear weapons by considering their expected value (probability of use multiplied by consequences), not just past outcomes. This helps understand the true long-term risk and potential for catastrophe.
18. Support Nuclear Risk Awareness
Express gratitude and support for individuals and organizations dedicated to preventing nuclear holocaust, as their continuous efforts are crucial for reducing global catastrophic risks and raising public awareness.
7 Key Quotes
So the outcome of a nuclear war is really bad. And we can kind of put parameters around how bad it would be, although there's a lot of uncertainty there.
Carl Robichaud
I think it's really folly to put, you know, as you say, we're rolling the dice every year. The more people are rolling dice every year, the more the chances are that something goes terribly wrong.
Carl Robichaud
You can't eliminate the knowledge of how to make nuclear weapons, and you can't change the laws of physics.
Carl Robichaud
The existence of nuclear weapons in the world are a prompt for other countries to consider these weapons.
Carl Robichaud
If a country is really set on getting nuclear weapons, they will have the technical means to do so. And so the only option then would be military action.
Carl Robichaud
A nuclear war cannot be won and must never be fought.
Carl Robichaud
It's just easier not to think about them.
Carl Robichaud