All of Optimist's Comments + Replies

I read their reasoning is that any nuclear weapon will create a firestorm. So the size of the weapon is almost irrelevant. It is true that a smaller weapon created the Hiroshima firestorm. Therefore they argue that even a Pakistan-India conflict would generate enough firestorms and generate enough aerosols to disrupt agriculture and kill billions.

I do not believe modern cities would firestorm as easily as Hiroshima which had mostly wooden structures. Most concrete structures would collapse and smother material inside them extinguishing fires created from t... (read more)

I'd also be keen to see additional work on the climate, agricultural, and famine effects of nuclear war, perhaps ideally by a third team which isn't connected to either of those teams.

You have probably read the Nature article but they predict 5 billion dead (out of 6.7 billion using 2010 statistics.)

https://www.nature.com/articles/s43016-022-00573-0

People are freaking out over their analysis.

https://www.reddit.com/r/science/comments/wp3t34/nuclear_war_would_cause_global_famine_with_more/

My bad, the first paragraph should have my thesis statement right? That and the remaining paragraphs are the supporting arguments. Good luck. The HTML embedding is not working for links. Their is probably a breakdown somewhere but this site needs a better UI.

My point was abstract threats are not motivating. People are terrified of war. But we have been beaten down and have no political agency. For instance, your comment sucks Optimist. You got the moderator mad. Yeah I hope so. People want this problem solved myself included, but the academics are worried about funding and impact factors.

Threads and the day after were the reason the stockpile was reduced. Diplomats had no impact on it until the public was motivated.

Your perspective is refreshing. I agree that nuclear winter is overblown. Nonetheless achieving the same countervalue strategy is possible without directly attacking cities. The EMP commission reported that up to 90% of the US population would die within a year after an EMP attack with nuclear weapons. The weapons would not create smoke and an EMP would force the country to devote resources to keeping people alive. In other words an EMP attack keeps demand high by not killing anyone but instantly drops the supply which eventually kills almost everyone.

Nort... (read more)

This was a lot to unpack but I agree that it would be extremely difficult for the human race to go extinct. Although 99.9% of all species have gone extinct. It is our enormous numbers and ability to adapt and specialize in different ecological niches using our tools instead of our biology that makes us hard to kill. I keep coming back to this forum because I like to see the academic perspective on nuclear conflict. Although there is still a lot of misinformation on surviving a nuclear war.

In my experience most people avoid thinking about nuclear conflict a... (read more)

1
TedSeay
2y
Here's the analysis: The problems with Reisner et al. (2018):   1.  “the impact of secondary ignitions, such as gas line breaks, are not considered ... For example, evidence of secondary ignitions in the Hiroshima conflagration ensuing the nuclear bombing ... led to unique conditions that resulted in significantly enhanced fire behavior.”  They ignored processes that took place in Hiroshima, preventing their simulation from producing as big fires.   2.  In contrast to the Hiroshima fire, Reisner et al. simulated a line fire, similar to most forest fires that start at a single point.  Hiroshima mass fires started from many ignition points distributed over the zone of the thermal pulse and pressure wave.  Such mass fires are much more intense than line fires. 3.  Reisner et al. assume a wind profile with 6–8 m/s winds in the boundary layer, which they call “very calm,” but which are significantly above the threshold of 3.6 m/s for a firestorm.  4.  They used “a section of suburban Atlanta, GA were chosen for use as a ‘generic suburb’ for the study.”  This is clearly not representative of dense cities in India and Pakistan, and therefore would not have the correct fuel loading.  They did this because they do not have data for India and Pakistan cities.  They claim, without support, that buildings there are primarily concrete and not wood.  However, even for concrete buildings, it is the contents that burn and provide the fuel load.  We are actually doing inventories of actual buildings to get this right. 5.  “A dry atmosphere was utilized, and pyro-cumulus impacts or precipitation from pyro-cumulonimbus were not considered.” Thus they eliminate a major source of buoyancy that would loft the soot, and latent heat of condensation. 6.  Their simulations of fire were only run for 40 minutes, and they did not actually model firestorms.   In summary, Reisner et al. (2018) modeled the wrong type of fire (they should have modeled a mass fire),  in an area with lower fuel
2
MichaelA
3y
I'd also be keen to see additional work on the climate, agricultural, and famine effects of nuclear war, perhaps ideally by a third team which isn't connected to either of those teams. I may soon write a (not super in-depth or groundbreaking) set of summaries/analyses of the limited work that does exist, for posting on the Forum. In the meantime, you may find the back-and-forth between the Toon team and the Reisner team interesting (if you haven't seen it already): https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019JD030777 https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019JD031281 

I will say it again this program needs to be fully funded. But I do wonder if the solution to this is genetic engineering.

Corn and potatoes are well adapted to the areas people live. Both are incredibly calorie dense with a high number of calories per acre. All GMO foods in existence now are further optimized to grow for the present sunlight and UV conditions.

What research has been done on creating GMO foods that are optimized to grow in low levels of sunlight and high levels of UV?

Ideally there would exist a variety of nuclear winter crops that are optimi... (read more)

Thank you for updating your research. I understand that only a handful of scientists are working on the nuclear winter problem. It seems like this is an area where effective altruism and yourself can make a major difference. I do have a few questions about nuclear winter since you mentioned looking into that subject in greater detail for future publications.

  1. If cities burn without creating a firestorm to lift black carbon into the stratosphere then would a nuclear winter persist for years or would it quickly rain out?

  2. Smoke is the result of incomplete

... (read more)

Even if I nailed the macro trends prediction, the Fed lowered interest rates, I cannot predict presidential tweets. Realistically, starting from the bottom you want to invest in low cost index funds.

VCs have a lot of capital to invest and only a few plays can make up for all their losses and then some. Most people cannot beat the market. I could spend all my time trying to squeeze out a few extra percent. However, I still would not know if I am a good investor with smart money or a dumb one who got lucky.

I can compound my investments historically around 10

... (read more)
5
Milan_Griffes
5y
Are these predictions informing your investments? Seems like you could make a lot of money if you're able to predict upcoming macro trends.

I can see how an extractive economy lowers the cost of labor. High labor costs and excess capital are the prerequisites for investing in labor saving technology.

It is not difficult for a bad government to copy existing technology that is more efficient. I believe the key difference between Africa and Asia is the green revolution of the 60s and 70s. The arguments are outlined here:

https://opinionator.blogs.nytimes.com/2014/04/09/a-green-revolution-this-time-for-africa/

As China increased their yields they were able to move labor from subsistence farming int

... (read more)

*correction

the cost $3340 should be multiplied by 0.003 and 72 years to make a nuclear winter lifetime hedge comparison to malaria. That is $721. This is about 10 years worth of wheat grain. It is still on par with malaria prevention but also looks better if it hedges against multiple existential risks.

The main roadblock to additional funding into alternate foods research is likely the same nuclear fatalism that also cuts into FEMA's budget. There is some validity to their arguments that this creates more countervalue targets. This is why decentralization, redundancy and resiliency is important. This same set of properties is what motivated the creation of the internet. A mixture of agricultural science, stored foods, alternate foods, fire prevention, arms treaties, and nuclear non-proliferation should all be pursued.

Any advances in those areas, es... (read more)

1
Optimist
5y
*correction the cost $3340 should be multiplied by 0.003 and 72 years to make a nuclear winter lifetime hedge comparison to malaria. That is $721. This is about 10 years worth of wheat grain. It is still on par with malaria prevention but also looks better if it hedges against multiple existential risks.

I appreciate your reply. I feel like I am learning a lot.


Have you ever read, Why Civil Defense Failed? The author argues civil defense failed because people took MAD literally. They believed that any attempts to stop or prevent total annihilation was utterly futile and only made things worse. They did not understand that an effective deterrence might be more effective and cheaper than guaranteeing total destruction. I think we both recognize the possibility MAD does not prevent conflicts but just makes them more deadly.

Civil defense during the cold war w... (read more)

4
Denkenberger
5y
I have not read it, but that is an interesting conclusion from "Why Civil Defense Failed." Some of the interventions for preventing firestorming were natural gas shut off, electrical shutoff, enhanced sprinklers, and automatically closing shades. One proposed in 1967 was intentionally exploding nuclear weapons beneath the city to create a fire break to stop the spread of a mass fire-talk about fighting fire with fire! That is interesting that the political incentive might actually be greater now to prevent fire storming. Still, preparing for alternate foods would be lower cost than preventing fire storming given nuclear winter or storing more food. So that's why I think alternate foods have a better chance of actually getting implemented. Yes, the industry that could be used for alternate foods may be targeted, but some alternate foods do not depend on industry still functioning. Furthermore, if the world were prepared for alternate foods, it could potentially provide these foods to the target countries.

I plan on reading your book first. I have noticed the assumption in this attack scenario is a surprise nuclear war, however, I think that is unlikely. There would be a period of tension when crisis upgrading and emergency personnel would be on alert. If an attack was expected then natural gas valves would be closed before the attack occurred. Preemptively shutting down utilities would be one way to encourage major cities to evacuate. Only 5% of the country would be subjected to lethal amounts of blast. It is more effective to spread out the population but ... (read more)

5
Denkenberger
5y
I looked into a dozen or so interventions for preventing firestorm given nuclear war. I estimated that some of them could be cost effective only looking at saving lives of US citizens. However, I abandoned the project once I realized that some of the ideas were around in the Cold War, and they were still not implemented, so it was very unlikely we would implement them now. If one side believes they are being attacked and launches weapons, there would not be a period of tension before the attack. Even if there is a period of tension like the Cuban missile crisis, I don’t believe that caused people to evacuate cities, though of course the attack could not have occurred as quickly as it could now. I’m not sure if your proposed diet has the required essential oils. These tend to go rancid, though they might still be safe to eat.

Sorry for the delay in my reply but I noticed your response after checking if she posted about risk mitigation.

I read the paper you linked and had previously listened to the 80000 hours podcast in alternative foods. I am for research into alternative foods. I think it is a good plan B and your methods should be tested to narrow down the uncertainty in their efficacy. However, my plan A would be $1,000 in flour baked into hardtack and a few thousand multivitamins or other food stores.

I do not think it is necessary to split hairs between counterforce and cou

... (read more)
4
Denkenberger
5y
Those videos were helpful. You mentioned that secondary fires can start because of natural gas supply-there is a book I’ve read discussing this in detail called Fire After Earthquake. I think secondary fires remain a large risk even with building codes because the valves to shut off the supply could be damaged by the blast. Sprinklers only have the capacity to put out a fire in one limited location of the building-since the thermal radiation from the fireball would set multiple fires, sprinklers would be overwhelmed. A big problem with food storage is that it would be trillions of dollars for the whole world to do it – very unlikely to get funded and it would exacerbate current malnutrition.

I have read everything you have posted so far and your thorough analysis has piqued my morbid curiosity. I feel that I should be playing devil’s advocate.

I think you might be underestimating the number of initial deaths in a nuclear exchange and overestimating the number of deaths from a nuclear winter with your assumptions. You do acknowledge that you assume only one nuclear weapon per city which downplays the importance of MIRVs.

Smaller and more accurate weapons will not reduce the total number of fatalities but kill many more people. Increasing the yiel

... (read more)

I agree that assuming only one nuclear weapon per metropolitan area is a severe underestimate. Luisa finds mortality of 36 million in the US of full-scale counter value. Most analysts find most people in metro areas to die, so it is more like 150 million dead.

But I don't think I agree that multiple independent reentry vehicles (MIRVs) will mean less firestorming. First we need to distinguish a mass fire with a moving combustion front and a firestorm which is the entire city burning simultaneously. It is the firestorm that would most likely inject smok... (read more)