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Nuclear war could end the world, but what if it’s all in our heads?

An influential nonprofit group is working on a project to apply insights from cognitive science and neuroscience to nuclear strategy and protocols — so leaders won’t bumble into atomic Armageddon.

Nuclear war has returned to the realm of dinner table conversation, weighing on the minds of the public more than it has in a generation.

It’s not just “Oppenheimer’s” big haul at the box office: Since Russia’s attack on Ukraine, the country’s officials have made nuclear threats. Russia has also suspended its participation in a nuclear arms control treaty with the United States. North Korea has launched demonstrative missiles. The United States, which is modernising its nuclear weapons, shot down a surveillance balloon from China, which is building up its atomic arsenal.

“The threat of nuclear use today, I believe, is as high as it has ever been in the nuclear age,” said Joan Rohlfing, president and chief operating officer of the Nuclear Threat Initiative, an influential nonprofit group in Washington, D.C.

In this environment, a conventional crisis runs a significant risk of turning nuclear. It only requires a world leader to decide to launch a nuclear attack. And that decision making process must be better understood.

Historically, scholarship on nuclear decision making grew out of economic theory, where analysts have often irrationally assumed that a “rational actor” is making decisions.

“We all know that humans make mistakes,” Rohlfing said. “We don’t always have good judgment. We behave differently under stress. And there are so many examples of human failures over the course of history. Why do we think it’s going to be any different with nuclear?”

But growing scientific understanding of the human brain hasn’t necessarily translated into adjustments in nuclear launch protocols.

Now there’s a push to change that. The organisation led by Rohlfing, for instance, is working on a project to apply insights from cognitive science and neuroscience to nuclear strategy and protocols — so leaders won’t bumble into atomic Armageddon.

But finding truly innovative, scientifically backed ideas to prevent an accidental or unnecessary nuclear attack is easier said than done. So is the task of presenting the work with adequate nuance.

Experts also need to persuade policymakers to apply research-based insights to real-world nuclear practice.

“The boundaries of that discourse are extraordinarily well protected,” said Anne I. Harrington, a nuclear scholar at Cardiff University in Wales, referring to internal pushback she says government insiders have faced when challenging the nuclear status quo. “So anyone who thinks that they’re going to make changes from the outside alone — I think that won’t happen.”

The world’s nuclear powers have different protocols for making the grave decision to use nuclear weapons. In the United States, absent an unlikely change to the balance of power among the branches of government, the decision rests with just one person.

“The most devastating weapons in the U.S. military arsenal can be ordered into use by only the president,” said Reja Younis of the Center for Strategic and International Studies in Washington, D.C., who is also a doctoral candidate in international relations at the Johns Hopkins School of Advanced International Studies.

In a crisis involving nuclear arms, Younis said, the president would probably meet with the secretary of defense, military leaders and other aides. Together, they would evaluate intelligence and discuss strategy, and the advisers would present the president with possible actions.

“Which could range from ‘let’s do nothing and see what happens’ to ‘let’s full-scale nuclear attack,’” said Alex Wellerstein, a professor at the Stevens Institute of Technology in New Jersey and head of a research project called “The President and the Bomb.”

In the end, though, only the president makes the call — and they can forgo guidance from advisers. A president could just press the proverbial button.

“These are the president’s weapons,” Rohlfing said.

Before his electoral victory in 2016, experts and political opponents began raising concerns about investing in Donald Trump the power to order a nuclear attack. That debate continued in Congress through his presidential term. By the time he left office, then-House Speaker Nancy Pelosi had openly asked the chairman of the Joint Chiefs of Staff to limit his ability to launch nuclear weapons.

It was in this milieu that Deborah G. Rosenblum, the executive vice president of the Nuclear Threat Initiative, invited Moran Cerf, a neuroscientist who is currently a professor at the Columbia Business School, to give a lecture to the organization in 2018. He titled it “Your Brain on Catastrophic Risk.” (Today, Rosenblum serves in the Biden administration as assistant secretary of defense for nuclear, chemical and biological defense programs — an office that briefs the president on nuclear matters.)

In a black T-shirt and jeans, Cerf briefed a room of experts and researchers on what brain science had to say about existentially troubling topics like nuclear war. The visit preceded a collaboration involving Cerf and a nonprofit called PopTech, whose conference Cerf hosts.

The groups, with a grant from the Carnegie Corporation of New York, are working to provide the government with science-based suggestions to improve nuclear launch protocols. Changing those policies is not impossible, but would require specific the right political scenario.

“You would need to have some sort of consensus that’s going to come from not just outside groups, but also policy and military insiders,” Harrington said. She added, “You probably also need the right president, honestly.”

Cerf has the rapid cadence of a TED Talk speaker. Born in France and raised in Israel, he went to college for physics, got a master’s in philosophy, joined a lab that studied consciousness at Caltech and then transitioned to and completed a Ph.D. there in neuroscience.

Along the way, he did mandatory military service in Israel, worked as a white-hat hacker, consulted on films and TV and won a Moth GrandSlam storytelling competition.

Cerf said his primary critique of the system for starting a nuclear war is that despite advances in our understanding of the fickle brain, the status quo assumes largely rational actors. In reality, he says, the fate of millions rests on individual psychology.

One of Cerf’s suggestions is to scan presidents’ brains and gain an understanding of the neuro-particulars of presidential decision making. Maybe one commander in chief functions better in the morning, another in the evening; one is better hungry, the other better sated.

Other ideas for improving the protocols that Cerf has spoken about publicly generally can be traced back to existing research on decision making or nuclear issues.

The group’s main recommendation, though, mirrors proposals by other advocates: Require another person (or people) to say yes to a nuclear strike. Wellerstein, who did not contribute to the group’s research, says that such a person needs the explicit power to say no.

“Our belief is that the system we have, which relies on a single decision-maker, who may or may not be equipped to make this decision, is a fragile and very risky system,” Rohlfing said.

Another of Cerf’s studies involves climate change. It found that when people were asked to stake money on climate outcomes, they would bet that global warming was happening, and they were more concerned about its impact, more supportive of action and more knowledgeable about relevant issues — even if they began as skeptics. “You basically change your own brain without anyone telling you anything,” Cerf said.

He thinks the results could be applied to nuclear scenarios because you could use bets to make people care about nuclear risk and support changes to policy. The findings could also be used to evaluate the thinking and prediction of aides who advise the president.

Some scholars of decision science don’t agree on such extrapolations.

“To go from there to giving advice on the fate of the world — I don’t think so,” said Baruch Fischhoff, a psychologist who studies decision making at Carnegie Mellon University.

Paul Slovic, a professor of psychology at the University of Oregon and president of the nonprofit Decision Research, said no psychological inquiry can stop at the experiment.

“You have to go back and forth between the laboratory studies, which are very constrained and limited, and looking out the window,” he said.

Any brain, even a commander in chief’s, has a difficult time with the large-scale empathy required to understand what launching a nuclear weapon means. “We can’t really perceive what it means to kill 30 million people,” Cerf said.

There is a long-standing psychological term for this: psychic numbing, coined by Robert Jay Lifton. Just because humans are intelligent enough to master destructive weapons “does not mean that we’re smart enough to manage them after they’re created,” said Slovic, whose research has extended the concept of psychic numbing.

Compounding this effect is the difficulty of paying appropriate attention to all important information. And that compounds with the tendency to make a decision based on one or a few prominent variables. “If we’re faced with choices that pose a conflict between security and saving distant foreign lives to which we’re numb because they’re just numbers, we go with security,” Slovic said.

In the past, Wellerstein says, nuclear launch plans have adapted to changing circumstances, philosophies and technologies. And presidents have changed the protocols because of fears that emerged in their historical moments: that the military would launch a nuke on its own, that the country would experience a nuclear Pearl Harbor or that an accident would occur.

Perhaps today’s fear is that individual psychology governs a world-altering choice. Given that, working to understand how brains might work in a nuclear crisis — and how they could work better — is worthwhile.

What comes after the science — how to change policy — is complicated, but not impossible. Nuclear protocols may have a sense of permanence, but they’re written in word processors, not stone.

“The current system that we have didn’t fall out of the sky fully formed,” Wellerstein said.

This article originally appeared in The New York Times.