Since the end of the World War II — the only time that atomic weapons have been used in war — the policy of the United States has been to discourage nuclear proliferation, whether through defense treaties, economic sanctions or controlling international sales of uranium. Similarly, the concept of nuclear deterrence depends on rational, predictable decisions about the use of nuclear weapons. Trump’s statements naturally caused a flurry of panic over an untested leader with little familiarity with the basic principles of nuclear security having control of atomic weapons. Fear of Trump having “the nuclear codes” became a sort of rallying cry for his opponents.

Americans terrified over this prospect, though, should take comfort in knowing that there is an option for limiting nuclear risk beyond panicking or praying. It may be time to resurrect a Cold War strategy for limiting nuclear risk: back-channel communications among private scientists.

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In 1955, a year after the U.S. test of a hydrogen bomb in the Bikini Atoll blanketed the globe with a thin layer of radioactive fallout, a group of scientists issued a manifesto against the development, testing and use of nuclear weapons. This public statement inspired what became known as the Pugwash Conference, an international scientists’ movement on behalf of nuclear disarmament. At the height of Pugwash’s influence in the late 1950s and early 1960s, scientists from the United States, the United Kingdom, the Soviet Union and a handful of other non-nuclear countries gathered regularly to discuss the nature of the nuclear threat and ways to reduce it.

Both today and at the time, commentators have held up Pugwash as a model of nonpartisan scientific activism, a shining example of what scientists could accomplish if they worked without the constraints of formal politics. In 1995, the Pugwash Conferences and Joseph Rotblat, one of the movement’s founders, received the Nobel Peace Prize for their roles in reducing nuclear tensions at the height of the Cold War.

More recently, the Obama administration hailed the personal relationship between Secretary of Energy Ernest Moniz and Ali Akbar Salehi, the head of Iran’s Atomic Energy Organization, as a critical ingredient in the nuclear agreement with Iran. The two men shared a background in physics and engineering and had overlapped at the Massachusetts Institute of Technology in the 1970s. While Moniz and Salehi obviously represented their respective countries at the negotiating table, their shared technical assumptions provided a platform on which to build political consensus.

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Both during and after the Cold War, the U.S. government supported initiatives that brought international scientists together outside formal political channels, whether in the form of academic conferences or cooperative research initiatives, like the European Organization for Nuclear Research (CERN). Beyond the nuclear realm, scientists have informally assisted U.S. officials in negotiating treaties on issues as diverse as climate change and exploration rights in Antarctica.

This strategy, commonly known as “science diplomacy,” has limitations. Scientists are not elected officials, and nothing in their scientific training is designed to prepare them for the subtleties of international political negotiations. The premise of science diplomacy risks putting power in the hands of technical experts whose personal interests may or may not match those of their national governments. And yet: There is no evidence to suggest that the elected head of government — Donald J. Trump — possesses the finesse needed to negotiate a nuclear crisis, either.

In 1955, scientists like Joseph Rotblat hoped to use their personal connections and technical expertise to avert a nuclear apocalypse. For the leaders of Pugwash, the point of an international scientists’ movement wasn’t so much to displace official negotiations between governments as to keep a line of communication open in the event of a crisis. The idea was that private citizens could maintain personal relationships even if their countries had severed formal relations, in much the same way that bipartisan dinner parties used to grease the wheels of government in Washington.

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During the Cuban missile crisis of 1962, for example, the American members of the Pugwash Committee sent their Soviet counterparts a telegram urging restraint and promising to use whatever limited influence they had over U.S. government officials to defuse the situation. The scientists acknowledged that the crisis could be solved only by heads of state but hoped that a mere reminder of their presence might jolt political leaders into recognizing the effects of a nuclear strike.

Whether the president-elect and his advisers realize it, Trump is going to need scientific expertise. His comments as a candidate suggest that he’ll scuttle the Iran deal and turn a blind eye to nuclear proliferation, all while engaging in a race with Russia to modernize the nuclear arsenal. It remains to be seen, of course, how many of these ideas will carry over to a Trump administration. In a normal administration, it would be a given that Trump and his advisers would confer with security experts who could provide a reality check on technical questions, from the stages of nuclear proliferation to the effects of modernized nuclear weapons on theories of deterrence. But the Trump campaign has defied expectations in a number of ways, and a Trump presidency is in many ways an open question.