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Peace activists wearing masks of Russian President Vladimir Putin and U.S. President Joe Biden pose with mock nuclear missiles in front of Berlin’s Brandenburg Gate on January 29, 2021.
The United States should back a proposal for a new United Nations study on the effects of nuclear war, using the latest science.
Coming up for a vote in early November is a resolution advanced by the Ireland and New Zealand delegations to the United Nations to commission a critical new scientific study on the effects of nuclear war. The study, which would be the first under U.N. auspices in more than 30 years, would be run by an independent scientific panel of 21 members and would examine the physical effects and societal consequences of a nuclear war on local, regional, and planetary scales. It would be comprehensive in its scope, including the climate, environmental, and radiological effects of nuclear war and how these would impact public health, global social and economic systems, agriculture, and ecosystems over periods of days, weeks, and decades.
That nuclear war would be catastrophic and potentially kill hundreds of millions of people has been well known for decades. But we have reason to believe that our current knowledge is incomplete, and some of it is out of date. Since the last time the U.N. commissioned such a report—its 1988 Study on the Climatic and Other Global Effects of Nuclear War—the world population has grown and changed in distribution, economies have become more interdependent, and the environment more fragile. New scientific information has yielded insights, including updates to our understanding of, and ability to model, the atmosphere, and the studies of the long-term effects of radiation on affected populations have yielded new information. Some of this technical work has been presented in the four Conferences on the Humanitarian Impacts of Nuclear Weapons.
It is also clear that additional research continues to be needed to fill important knowledge gaps. New studies are being published and commissioned and research gaps are being identified. There have been recently updated studies published of the radiological fallout impacts of atmospheric nuclear detonations and of ground bursts, and the U.S. National Academies is currently conducting an Independent Study on Potential Environmental Effects of Nuclear War to try to improve our understanding of the risks and effects of nuclear winter, which recent research suggests could kill hundreds of millions or billions of people. In a 2022 report, the U.S. National Academies urged the development of a research program to better understand the effects of low-dose ionizing radiation using recent advances in epidemiology, biological understanding of disease occurrence, and computational and analytical technologies, and it has also become clear that our understanding of how radiation affects women and children differently than men is incomplete.
As long as countries possess nuclear weapons, nuclear war is a possibility.
There is little current, detailed information available about how even a limited nuclear war could affect social and economic systems, including how damage to industry, energy production, and financial systems would affect human well-being and what subsequent migration, conflict, and disease would result. Studies in the 1980s indicated that a relatively limited nuclear war could cause a U.S. economic collapse, which would take many years to recover from, and larger-scale attacks could cause damage from which recovery might not be possible.
A 2023 study by the U.S. National Academies on Risk Analysis Methods for Nuclear War and Nuclear Terrorism, tasked to look at the likelihood and consequences of different nuclear war scenarios, found the information about the consequences incomplete. Given this, the study advised, “There is a need to improve the understanding of less-well-understood physical effects of nuclear weapons (such as fires; damage in modern urban environments; electromagnetic pulse effects; and climatic effects, such as nuclear winter), as well as the assessment and estimation of psychological, societal, and political consequences of nuclear weapons use.”
As long as countries possess nuclear weapons, nuclear war is a possibility. Nuclear war does not respect national boundaries, and countries not party to the conflict may be affected, potentially catastrophically. The global community deserves a rigorous, science-based understanding of these possible consequences. This lack of understanding is not limited to the public. The nuclear war consequence models maintained by the Defense Threat Reduction Agency (DTRA) for the U.S. Department of Defense provide an incomplete picture, according to the 2023 National Academies study, which found these assessments to be “focused on prompt effects and military objectives. This results in a partial accounting of the consequences leading to a limited understanding of the breadth of the outcomes.”
This new U.N. study needs to be legitimate, transparent, inclusive, and accountable. The global community expects this type of authoritative scientific assessment on global existential threats from its international bodies; an example is the Intergovernmental Panel on Climate Change (IPCC) that was created to provide governments and the public with regular scientific assessments on climate change, risks posed, and solutions.
Scientists have regularly provided critical information and perspectives that have served to sound the alarm on the dangers of the use of nuclear weapons. They’ve done so from the very first moments of the nuclear age, when Manhattan Project scientists wrote the Franck report foretelling the nuclear arms race and signed a Leo Szilard-spearheaded petition to forego the first use of a nuclear bomb. Later, scientists working independently from governments went on to publicly illuminate the dangerous effects of radioactive fallout from atmospheric nuclear explosions on unsuspecting people, and used those findings to create momentum for the 1963 Partial Test Ban Treaty, which kept tests below ground. Scientists have been warning us since the 1980s about nuclear winter—the scenario in which soot from firestorms set off by nuclear war could be lofted into the stratosphere and persist for years, disrupting the climate and thus agriculture on global scales, inducing widespread famine.
In April of this year, the national science academies of the G7 countries (Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States) weighed in, issuing a statement for the first time on nuclear weapons. They declared that “it is imperative to highlight the known consequences of nuclear warfare,” adding that there is strong scientific evidence that “depending on the scale of use of nuclear weapons, there is the potential for the destruction of entire ecosystems and extinction of species, due to the direct impact of explosions and fires and altered climatic conditions. In the worst cases this could be on the scale of a mass extinction.”
The academies further urged the scientific community “to continue to develop and communicate the scientific evidence base that shows the catastrophic effects of nuclear warfare on human populations and other species with which we share our planet.”
Given that the United States relies on a strategy of nuclear deterrence, which seeks to obtain security by threatening nuclear war, it seems obvious that this country should want to fully understand the risks it is running.
Nuclear-armed states do not run these risks alone. The rest of the world can be affected by nuclear war via radioactive fallout, environmental changes such as nuclear winter, and disruption of the global economic system. Almost any nuclear war would be a global problem.
As a country with a strong global leadership role, the United States should co-sponsor this resolution and encourage its allies to do the same. The United States should also provide technical advice and offer the participation of its most knowledgeable scientists, while supporting the participation of scientists from a wide range of other nations and communities to ensure their perspectives are included in the scoping and execution of the study.
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Coming up for a vote in early November is a resolution advanced by the Ireland and New Zealand delegations to the United Nations to commission a critical new scientific study on the effects of nuclear war. The study, which would be the first under U.N. auspices in more than 30 years, would be run by an independent scientific panel of 21 members and would examine the physical effects and societal consequences of a nuclear war on local, regional, and planetary scales. It would be comprehensive in its scope, including the climate, environmental, and radiological effects of nuclear war and how these would impact public health, global social and economic systems, agriculture, and ecosystems over periods of days, weeks, and decades.
That nuclear war would be catastrophic and potentially kill hundreds of millions of people has been well known for decades. But we have reason to believe that our current knowledge is incomplete, and some of it is out of date. Since the last time the U.N. commissioned such a report—its 1988 Study on the Climatic and Other Global Effects of Nuclear War—the world population has grown and changed in distribution, economies have become more interdependent, and the environment more fragile. New scientific information has yielded insights, including updates to our understanding of, and ability to model, the atmosphere, and the studies of the long-term effects of radiation on affected populations have yielded new information. Some of this technical work has been presented in the four Conferences on the Humanitarian Impacts of Nuclear Weapons.
It is also clear that additional research continues to be needed to fill important knowledge gaps. New studies are being published and commissioned and research gaps are being identified. There have been recently updated studies published of the radiological fallout impacts of atmospheric nuclear detonations and of ground bursts, and the U.S. National Academies is currently conducting an Independent Study on Potential Environmental Effects of Nuclear War to try to improve our understanding of the risks and effects of nuclear winter, which recent research suggests could kill hundreds of millions or billions of people. In a 2022 report, the U.S. National Academies urged the development of a research program to better understand the effects of low-dose ionizing radiation using recent advances in epidemiology, biological understanding of disease occurrence, and computational and analytical technologies, and it has also become clear that our understanding of how radiation affects women and children differently than men is incomplete.
As long as countries possess nuclear weapons, nuclear war is a possibility.
There is little current, detailed information available about how even a limited nuclear war could affect social and economic systems, including how damage to industry, energy production, and financial systems would affect human well-being and what subsequent migration, conflict, and disease would result. Studies in the 1980s indicated that a relatively limited nuclear war could cause a U.S. economic collapse, which would take many years to recover from, and larger-scale attacks could cause damage from which recovery might not be possible.
A 2023 study by the U.S. National Academies on Risk Analysis Methods for Nuclear War and Nuclear Terrorism, tasked to look at the likelihood and consequences of different nuclear war scenarios, found the information about the consequences incomplete. Given this, the study advised, “There is a need to improve the understanding of less-well-understood physical effects of nuclear weapons (such as fires; damage in modern urban environments; electromagnetic pulse effects; and climatic effects, such as nuclear winter), as well as the assessment and estimation of psychological, societal, and political consequences of nuclear weapons use.”
As long as countries possess nuclear weapons, nuclear war is a possibility. Nuclear war does not respect national boundaries, and countries not party to the conflict may be affected, potentially catastrophically. The global community deserves a rigorous, science-based understanding of these possible consequences. This lack of understanding is not limited to the public. The nuclear war consequence models maintained by the Defense Threat Reduction Agency (DTRA) for the U.S. Department of Defense provide an incomplete picture, according to the 2023 National Academies study, which found these assessments to be “focused on prompt effects and military objectives. This results in a partial accounting of the consequences leading to a limited understanding of the breadth of the outcomes.”
This new U.N. study needs to be legitimate, transparent, inclusive, and accountable. The global community expects this type of authoritative scientific assessment on global existential threats from its international bodies; an example is the Intergovernmental Panel on Climate Change (IPCC) that was created to provide governments and the public with regular scientific assessments on climate change, risks posed, and solutions.
Scientists have regularly provided critical information and perspectives that have served to sound the alarm on the dangers of the use of nuclear weapons. They’ve done so from the very first moments of the nuclear age, when Manhattan Project scientists wrote the Franck report foretelling the nuclear arms race and signed a Leo Szilard-spearheaded petition to forego the first use of a nuclear bomb. Later, scientists working independently from governments went on to publicly illuminate the dangerous effects of radioactive fallout from atmospheric nuclear explosions on unsuspecting people, and used those findings to create momentum for the 1963 Partial Test Ban Treaty, which kept tests below ground. Scientists have been warning us since the 1980s about nuclear winter—the scenario in which soot from firestorms set off by nuclear war could be lofted into the stratosphere and persist for years, disrupting the climate and thus agriculture on global scales, inducing widespread famine.
In April of this year, the national science academies of the G7 countries (Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States) weighed in, issuing a statement for the first time on nuclear weapons. They declared that “it is imperative to highlight the known consequences of nuclear warfare,” adding that there is strong scientific evidence that “depending on the scale of use of nuclear weapons, there is the potential for the destruction of entire ecosystems and extinction of species, due to the direct impact of explosions and fires and altered climatic conditions. In the worst cases this could be on the scale of a mass extinction.”
The academies further urged the scientific community “to continue to develop and communicate the scientific evidence base that shows the catastrophic effects of nuclear warfare on human populations and other species with which we share our planet.”
Given that the United States relies on a strategy of nuclear deterrence, which seeks to obtain security by threatening nuclear war, it seems obvious that this country should want to fully understand the risks it is running.
Nuclear-armed states do not run these risks alone. The rest of the world can be affected by nuclear war via radioactive fallout, environmental changes such as nuclear winter, and disruption of the global economic system. Almost any nuclear war would be a global problem.
As a country with a strong global leadership role, the United States should co-sponsor this resolution and encourage its allies to do the same. The United States should also provide technical advice and offer the participation of its most knowledgeable scientists, while supporting the participation of scientists from a wide range of other nations and communities to ensure their perspectives are included in the scoping and execution of the study.
Coming up for a vote in early November is a resolution advanced by the Ireland and New Zealand delegations to the United Nations to commission a critical new scientific study on the effects of nuclear war. The study, which would be the first under U.N. auspices in more than 30 years, would be run by an independent scientific panel of 21 members and would examine the physical effects and societal consequences of a nuclear war on local, regional, and planetary scales. It would be comprehensive in its scope, including the climate, environmental, and radiological effects of nuclear war and how these would impact public health, global social and economic systems, agriculture, and ecosystems over periods of days, weeks, and decades.
That nuclear war would be catastrophic and potentially kill hundreds of millions of people has been well known for decades. But we have reason to believe that our current knowledge is incomplete, and some of it is out of date. Since the last time the U.N. commissioned such a report—its 1988 Study on the Climatic and Other Global Effects of Nuclear War—the world population has grown and changed in distribution, economies have become more interdependent, and the environment more fragile. New scientific information has yielded insights, including updates to our understanding of, and ability to model, the atmosphere, and the studies of the long-term effects of radiation on affected populations have yielded new information. Some of this technical work has been presented in the four Conferences on the Humanitarian Impacts of Nuclear Weapons.
It is also clear that additional research continues to be needed to fill important knowledge gaps. New studies are being published and commissioned and research gaps are being identified. There have been recently updated studies published of the radiological fallout impacts of atmospheric nuclear detonations and of ground bursts, and the U.S. National Academies is currently conducting an Independent Study on Potential Environmental Effects of Nuclear War to try to improve our understanding of the risks and effects of nuclear winter, which recent research suggests could kill hundreds of millions or billions of people. In a 2022 report, the U.S. National Academies urged the development of a research program to better understand the effects of low-dose ionizing radiation using recent advances in epidemiology, biological understanding of disease occurrence, and computational and analytical technologies, and it has also become clear that our understanding of how radiation affects women and children differently than men is incomplete.
As long as countries possess nuclear weapons, nuclear war is a possibility.
There is little current, detailed information available about how even a limited nuclear war could affect social and economic systems, including how damage to industry, energy production, and financial systems would affect human well-being and what subsequent migration, conflict, and disease would result. Studies in the 1980s indicated that a relatively limited nuclear war could cause a U.S. economic collapse, which would take many years to recover from, and larger-scale attacks could cause damage from which recovery might not be possible.
A 2023 study by the U.S. National Academies on Risk Analysis Methods for Nuclear War and Nuclear Terrorism, tasked to look at the likelihood and consequences of different nuclear war scenarios, found the information about the consequences incomplete. Given this, the study advised, “There is a need to improve the understanding of less-well-understood physical effects of nuclear weapons (such as fires; damage in modern urban environments; electromagnetic pulse effects; and climatic effects, such as nuclear winter), as well as the assessment and estimation of psychological, societal, and political consequences of nuclear weapons use.”
As long as countries possess nuclear weapons, nuclear war is a possibility. Nuclear war does not respect national boundaries, and countries not party to the conflict may be affected, potentially catastrophically. The global community deserves a rigorous, science-based understanding of these possible consequences. This lack of understanding is not limited to the public. The nuclear war consequence models maintained by the Defense Threat Reduction Agency (DTRA) for the U.S. Department of Defense provide an incomplete picture, according to the 2023 National Academies study, which found these assessments to be “focused on prompt effects and military objectives. This results in a partial accounting of the consequences leading to a limited understanding of the breadth of the outcomes.”
This new U.N. study needs to be legitimate, transparent, inclusive, and accountable. The global community expects this type of authoritative scientific assessment on global existential threats from its international bodies; an example is the Intergovernmental Panel on Climate Change (IPCC) that was created to provide governments and the public with regular scientific assessments on climate change, risks posed, and solutions.
Scientists have regularly provided critical information and perspectives that have served to sound the alarm on the dangers of the use of nuclear weapons. They’ve done so from the very first moments of the nuclear age, when Manhattan Project scientists wrote the Franck report foretelling the nuclear arms race and signed a Leo Szilard-spearheaded petition to forego the first use of a nuclear bomb. Later, scientists working independently from governments went on to publicly illuminate the dangerous effects of radioactive fallout from atmospheric nuclear explosions on unsuspecting people, and used those findings to create momentum for the 1963 Partial Test Ban Treaty, which kept tests below ground. Scientists have been warning us since the 1980s about nuclear winter—the scenario in which soot from firestorms set off by nuclear war could be lofted into the stratosphere and persist for years, disrupting the climate and thus agriculture on global scales, inducing widespread famine.
In April of this year, the national science academies of the G7 countries (Canada, France, Germany, Italy, Japan, the United Kingdom, and the United States) weighed in, issuing a statement for the first time on nuclear weapons. They declared that “it is imperative to highlight the known consequences of nuclear warfare,” adding that there is strong scientific evidence that “depending on the scale of use of nuclear weapons, there is the potential for the destruction of entire ecosystems and extinction of species, due to the direct impact of explosions and fires and altered climatic conditions. In the worst cases this could be on the scale of a mass extinction.”
The academies further urged the scientific community “to continue to develop and communicate the scientific evidence base that shows the catastrophic effects of nuclear warfare on human populations and other species with which we share our planet.”
Given that the United States relies on a strategy of nuclear deterrence, which seeks to obtain security by threatening nuclear war, it seems obvious that this country should want to fully understand the risks it is running.
Nuclear-armed states do not run these risks alone. The rest of the world can be affected by nuclear war via radioactive fallout, environmental changes such as nuclear winter, and disruption of the global economic system. Almost any nuclear war would be a global problem.
As a country with a strong global leadership role, the United States should co-sponsor this resolution and encourage its allies to do the same. The United States should also provide technical advice and offer the participation of its most knowledgeable scientists, while supporting the participation of scientists from a wide range of other nations and communities to ensure their perspectives are included in the scoping and execution of the study.