Founded in 1945 by University of Chicago scientists who had helped develop the first atomic weapons in the Manhattan Project, the Bulletin of the Atomic Scientists created the Doomsday Clock two years later, using the imagery of apocalypse (midnight) and the contemporary idiom of nuclear explosion (countdown to zero) to convey threats to humanity and the planet. The decision to move (or to leave in place) the minute hand of the Doomsday Clock is made every year by the Bulletin’s Science and Security Board in consultation with its Board of Sponsors, which includes 15 Nobel laureates. The Clock has become a universally recognized indicator of the world’s vulnerability to catastrophe from nuclear weapons, climate change, and new technologies emerging in other domains. A printable PDF of this statement, complete with the President and CEO’s statement and Science and Security Board biographies, is available here.
To: Leaders and citizens of the world
Re: Two minutes to midnight
Date: January 25, 2018
In 2017, world leaders failed to respond effectively to the looming threats of nuclear war and climate change, making the world security situation more dangerous than it was a year ago—and as dangerous as it has been since World War II.
The greatest risks last year arose in the nuclear realm. North Korea’s nuclear weapons program made remarkable progress in 2017, increasing risks to North Korea itself, other countries in the region, and the United States.
Hyperbolic rhetoric and provocative actions by both sides have increased the possibility of nuclear war by accident or miscalculation.
But the dangers brewing on the Korean Peninsula were not the only nuclear risks evident in 2017: The United States and Russia remained at odds, continuing military exercises along the borders of NATO, undermining the Intermediate-Range Nuclear Forces Treaty (INF), upgrading their nuclear arsenals, and eschewing arms control negotiations.
In the Asia-Pacific region, tensions over the South China Sea have increased, with relations between the United States and China insufficient to re-establish a stable security situation.
In South Asia, Pakistan and India have continued to build ever-larger arsenals of nuclear weapons.
And in the Middle East, uncertainty about continued US support for the landmark Iranian nuclear deal adds to a bleak overall picture.
To call the world nuclear situation dire is to understate the danger—and its immediacy.
On the climate change front, the danger may seem less immediate, but avoiding catastrophic temperature increases in the long run requires urgent attention now. Global carbon dioxide emissions have not yet shown the beginnings of the sustained decline towards zero that must occur if ever-greater warming is to be avoided. The nations of the world will have to significantly decrease their greenhouse gas emissions to keep climate risks manageable, and so far, the global response has fallen far short of meeting this challenge.
Beyond the nuclear and climate domains, technological change is disrupting democracies around the world as states seek and exploit opportunities to use information technologies as weapons, among them internet-based deception campaigns aimed at undermining elections and popular confidence in institutions essential to free thought and global security.
The Bulletin of the Atomic Scientists Science and Security Board believes the perilous world security situation just described would, in itself, justify moving the minute hand of the Doomsday Clock closer to midnight.
But there has also been a breakdown in the international order that has been dangerously exacerbated by recent US actions. In 2017, the United States backed away from its long-standing leadership role in the world, reducing its commitment to seek common ground and undermining the overall effort toward solving pressing global governance challenges. Neither allies nor adversaries have been able to reliably predict US actions—or understand when US pronouncements are real, and when they are mere rhetoric. International diplomacy has been reduced to name-calling, giving it a surreal sense of unreality that makes the world security situation ever more threatening.
Because of the extraordinary danger of the current moment, the Science and Security Board today moves the minute hand of the Doomsday Clock 30 seconds closer to catastrophe. It is now two minutes to midnight—the closest the Clock has ever been to Doomsday, and as close as it was in 1953, at the height of the Cold War.
The Science and Security Board hopes this resetting of the Clock will be interpreted exactly as it is meant—as an urgent warning of global danger. The time for world leaders to address looming nuclear danger and the continuing march of climate change is long past. The time for the citizens of the world to demand such action is now:
The untenable nuclear threat. The risk that nuclear weapons may be used—intentionally or because of miscalculation—grew last year around the globe.
North Korea has long defied UN Security Council resolutions to cease its nuclear and ballistic missile tests, but the acceleration of its tests in 2017 reflects new resolve to acquire sophisticated nuclear weapons. North Korea has or soon will have capabilities to match its verbal threats—specifically, a thermonuclear warhead and a ballistic missile that can carry it to the US mainland. In September, North Korea tested what experts assess to be a true two-stage thermonuclear device, and in November, it tested the Hwasong-15 missile, which experts believe has a range of over 8,000 kilometers. The United States and its allies, Japan and South Korea, responded with more frequent and larger military exercises, while China and Russia proposed a freeze by North Korea of nuclear and missile tests in exchange for a freeze in US exercises.
The failure to secure a temporary freeze in 2017 was unsurprising to observers of the downward spiral of nuclear rhetoric between US President Donald Trump and North Korean leader Kim Jong-un. The failure to rein in North Korea’s nuclear program will reverberate not just in the Asia-Pacific, as neighboring countries review their security options, but more widely, as all countries consider the costs and benefits of the international framework of nonproliferation treaties and agreements.
Nuclear risks have been compounded by US-Russia relations that now feature more conflict than cooperation. Coordination on nuclear risk reduction is all but dead, and no solution to disputes over the INF Treaty—a landmark agreement to rid Europe of medium-range nuclear missiles—is readily apparent. Both sides allege violations, but Russia’s deployment of a new ground-launched cruise missile, if not addressed, could trigger a collapse of the treaty. Such a collapse would make what should have been a relatively easy five-year
extension of the New START arms control pact much harder to achieve and could terminate an arms control process that dates back to the early 1970s.
For the first time in many years, in fact, no US-Russian nuclear arms control negotiations are under way. New strategic stability talks begun in April are potentially useful, but so far they lack the energy and political commitment required for them to bear fruit. More important, Russia’s invasion and annexation of Crimea and semi-covert support of separatists in eastern Ukraine have sparked concerns that Russia will support similar “hybrid” conflicts in new NATO members that it borders—actions that could provoke a crisis at almost any time. Additional clash points could emerge if Russia attempts to exploit friction between the United States and its NATO partners, whether arising from disputes on burden-sharing, European Union membership, and trade—or relating to policies on Israel, Iran, and terrorism in the Middle East.
In the past year, US allies have needed reassurance about American intentions more than ever. Instead, they have been forced to negotiate a thicket of conflicting policy statements from a US administration weakened in its cadre of foreign policy professionals, suffering from turnover in senior leadership, led by an undisciplined and disruptive president, and unable to develop, coordinate, and clearly communicate a coherent nuclear policy. This inconsistency constitutes a major challenge for deterrence, alliance management, and global stability. It has made the existing nuclear risks greater than necessary and added to their complexity.
Especially in the case of the Iran nuclear deal, allies are perplexed. While President Trump has steadfastly opposed the agreement that his predecessor and US allies negotiated to keep Iran from developing nuclear weapons, he has never successfully articulated practical alternatives. His instruction to Congress in 2017 to legislate a different approach resulted in a stalemate. The future of the Iran deal, at this writing, remains uncertain.
In the United States, Russia, and elsewhere around the world, plans for nuclear force modernization and development continue apace. The Trump administration’s Nuclear Posture Review appears likely to increase the types and roles of nuclear weapons in US defense plans and lower the threshold to nuclear use. In South Asia, emphasis on nuclear and missile capabilities grows. Conventional force imbalances and destabilizing plans for nuclear weapons use early in any conflict continue to plague the subcontinent.
Reflecting long decades of frustration with slow progress toward nuclear disarmament, states signed a Treaty on the Prohibition of Nuclear Weapons, commonly known as the ban treaty, at the United Nations this past September. The treaty—championed by the International Campaign to Abolish Nuclear Weapons, which has been awarded the Nobel Peace Prize for its work—is a symbolic victory for those seeking a world without nuclear weapons and a strong expression of the frustration with global disarmament efforts to date. Predictably, countries with nuclear weapons boycotted the negotiations, and none has signed the ban treaty. Their increased reliance on nuclear weapons, threats, and doctrines that could make the use of those weapons more likely stands in stark contrast to the expectations of the rest of the world.
An insufficient response to climate change. Last year, the US government pursued unwise and ineffectual policies on climate change, following through on a promise to derail past US climate policies. The Trump administration, which includes avowed climate denialists in top positions at the Environmental Protection Agency, the Interior Department, and other key agencies, has announced its plan to withdraw from the Paris Agreement. In its rush to dismantle rational climate and energy policy, the administration has ignored scientific fact and well-founded economic analyses.
These US government climate decisions transpired against a backdrop of worsening climate change and high-impact weather-related disasters. This year past, the Caribbean region and other parts of North America suffered a season of historic damage from exceedingly powerful hurricanes. Extreme heat waves occurred in Australia, South America, Asia, Europe, and California, with mounting evidence that heat-related illness and death are correspondingly increasing.
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