Summary: Nuclear War: A Scenario

The GIST

Nuclear War: A Scenario by Annie Jacobsen is a work of speculative nonfiction that answers a question most of us would rather not ask: what would actually happen, minute by minute, if deterrence failed? Jacobsen, an American journalist, published it in 2024 as her seventh book, drawing on fifteen years of interviews and on declassified government documents. The scenario is invented, but every piece of it, the satellites, the bunkers, the launch procedures, the weapons, is built from fact. It begins with a single North Korean missile and ends, 72 minutes later, with global thermonuclear war, followed by a nuclear winter and the deaths of five billion people.

She has said plainly why she wrote it: "to demonstrate—in appalling, minute-by-minute detail—just how horrifying a nuclear war would be." The generation that witnessed nuclear explosions is dying, and many of the Cold War engineers and officials who spoke to her on the record did so out of fear that once they are gone, nobody will remember what these weapons do. One line she heard, from a deputy commander of U.S. Strategic Command, became the spine of the book: "deterrence holds unless it doesn't, and then it all unravels." This is the story of the unravelling.

The Big Ideas

A fiction built entirely from facts

The author's note sets out the ground rules. Since the early 1950s the United States has spent trillions of dollars preparing for nuclear war and making sure the government would survive one. The scenario is imagined, but assembled from expert testimony and declassified records. Jacobsen chooses a one-megaton bomb on Washington because a surprise attack out of nowhere, a "Bolt out of the Blue," is what American defence officials fear most. And she holds that once the United States retaliates, general nuclear war and the end of civilisation follow. As a former STRATCOM commander, General Robert Kehler, told her: "The world could end in the next couple of hours."

The prologue then shows the reader what one bomb means. A one-megaton thermonuclear weapon detonates above the Pentagon. In milliseconds the temperature reaches 180 million degrees Fahrenheit, and the building's 27,000 employees are turned to carbon. Two and a half miles away, the clothes of 35,000 fans at a baseball stadium catch fire; they suffer third-degree burns in a city whose main hospital has ten burn beds. A million people are dead within ninety seconds. Then the gas lines rupture, the mega-fires begin, and survivors stumble through a radioactive wasteland with no power, no water and no one coming to help.

How we got here: the plan and the buildup

Part One is the book's only stretch of pure history, and it is chilling in its own right. In December 1960, at Strategic Command headquarters at Offutt Air Force Base, the Secretary of Defense, the Joint Chiefs and other senior officers gathered to finalise a secret plan for nuclear war against the Soviet Union. One participant, John Rubel, described it decades later in a memoir. The plan, the Single Integrated Operational Plan or SIOP, called for a pre-emptive strike that would kill 275 million people in the first hour and 325 million more within six months, half of them outside the Soviet Union, including 300 million Chinese civilians. Moscow alone was to receive the equivalent of four thousand Hiroshimas.

Only one man in the room objected. Marine Corps Commandant David M. Shoup said that "any plan that murders 300 million Chinese when it might not even be their war is not a good plan. That is not the American way." He was met with stunned silence. Rubel later compared the meeting to the Wannsee Conference, where the Nazis planned the Final Solution.

To give those numbers a human face, Jacobsen turns to Hiroshima, where a single 15-kiloton bomb killed 80,000 people instantly, and to two survivors: thirteen-year-old Setsuko Thurlow, just over a mile from ground zero, and Dr. Michihiko Hachiya, whose clothes were blown from his body.

Then comes the arithmetic of the arms race. The United States had one bomb left when the war ended, 170 by 1949, a number then thought enough to destroy the Soviet Union, and 18,638 by 1960. The word used to justify it all was deterrence. The stockpile peaked at 31,255 in 1967 and stands at about 5,000 today, with 1,770 ready to launch, and Russia holds similar numbers. The successor to the 1960 plan is still in force, with plans aimed at Russia, China, North Korea and Iran, despite Reagan and Gorbachev's joint declaration that "a nuclear war cannot be won and must never be fought."

The first 24 minutes: six minutes to decide

The clock starts at 3:03 in the afternoon on March 30, when a rocket ignites in North Korea. American infrared satellites see the flame in four-tenths of a second. Within five seconds analysts conclude it is an intercontinental missile carrying a one-megaton warhead; within half a minute they know it is heading for the East Coast. It makes no strategic sense, since one warhead cannot cripple the United States and the attacker will be annihilated in return. It is coming anyway.

Jacobsen walks through the machinery that wakes up: the three command centres, the countdown clocks at STRATCOM, the call from the Secretary of Defense to a bewildered president, who is the one person in the chain of command who has never rehearsed this. He learns he has about six minutes to decide whether and how to retaliate, under a policy called Launch on Warning. Meanwhile missile defence is tried and fails. The country has 44 interceptors with a success rate of 55 percent; four are fired, and all four miss.

In the bunker under the White House the military aide opens the "Football," the briefcase holding the Black Book of retaliation options. "Tell me what to do," the president asks the chairman of the Joint Chiefs, who can only advise. The generals press for an immediate launch; the Secretary of Defense pleads for restraint and a call to Moscow and Beijing. As the president reaches for the card with the launch codes, his Secret Service detail bursts in and drags him away to save his life. Then a second missile appears, fired from a submarine off California at the Diablo Canyon nuclear power plant, whose reactors melt down beneath the fireball. Airborne in his helicopter, the president finally authorises a counterstrike on 82 North Korean targets.

The next 24 minutes: one misreading

Here the scenario turns on a detail of geography and a flaw in a machine. American land-based missiles cannot reach North Korea without flying over Russia. And Russia's Tundra early-warning satellites, which have a history of mistaking clouds for missiles, report not dozens of American launches but hundreds, apparently aimed at Russia itself.

Everything depends on a phone call that does not happen in time. The Secretary of Defense, racing to a bunker, tries to reach Moscow. Washington is destroyed at 32 minutes and 30 seconds, moments after the president and his aide parachute from the helicopter. When an American general finally gets his Russian counterpart on the line, the reply is icy: "Your president should have called us by now." Jacobsen recalls Colonel Stanislav Petrov, who in 1983 judged a satellite warning to be a false alarm. In her scenario the officer on duty trusts the data. In a bunker in Siberia, the Russian president, insulted, surrounded by paranoid advisers and with six minutes of his own, orders a counterstrike of roughly a thousand warheads.

The final 24 minutes: everyone loses

With the president missing, the Secretary of Defense is sworn in as acting president. He knows he has minutes to live, and he asks why hundreds of millions of innocent people must die. Then he relents and orders the most extreme option, 975 targets across Russia. The logic is "use them or lose them," because the silos will be gone within minutes. On NATO airbases, pilots run to their jets for missions they know they will not return from.

North Korea, before it is erased, takes its revenge twice over: chemical shells on South Korea, and a Super-EMP weapon detonated 300 miles above the United States, an electromagnetic pulse that knocks out the systems controlling the country's entire electrical grid. A commission had warned of this danger for years. Then the Russian warheads arrive, across America and across Europe. Jacobsen's verdict is four words long: "Everyone loses. Everyone."

After the fire: nuclear winter

The last part looks beyond the 72 minutes. The fires loft 150 million metric tons of soot into the sky, cutting the sun's warmth by 80 percent. Temperatures fall, rainfall drops by nearly half, and a nuclear winter settles in for years. Farming collapses; great breadbaskets freeze all year round. Famine kills five billion people, with survival possible mainly in parts of the Southern Hemisphere. When the cold finally lifts, a ruined ozone layer leaves the surface exposed to ultraviolet light, and the survivors live underground. Jacobsen ends by wondering what any distant descendants would make of our remains, and whether they would understand that the enemy was never another nation, but the weapons themselves.

Putting It to Work

• Know how thin the margin is. In this account a president has about six minutes to make a decision that could end civilisation, and he is the only person in the chain who has never practised it.
• Don't assume a shield exists. Jacobsen's picture of missile defence is 44 interceptors with roughly even odds each. Deterrence, not defence, is what the system rests on.
• Watch for the single point of failure. The catastrophe turns on a faulty satellite, an unanswered phone and missiles that must overfly a rival. Misunderstanding, not malice, does most of the damage.
• Remember that the plans are current. The mass-casualty war plans drawn up in 1960 have descendants in force today, and thousands of warheads remain ready.
• Keep the memory alive. Jacobsen's sources feared a world that has forgotten what these weapons do. She hopes narrative can shift opinion and policy, as On the Beach and The Day After once did. Reading, discussing and passing on this history is the modest thing a citizen can do.

Who Should Read It

This is for readers who want to understand the nuclear world as it is, not as films imagine it: anyone interested in national security, the Cold War and its unfinished business, or simply in how the systems that are supposed to protect us would behave under the worst pressure imaginable. It reads with the speed of a thriller and the weight of a warning, and it is not comfortable. Those who admired John Hersey's Hiroshima or Jonathan Schell's The Fate of the Earth will recognise the tradition, and anyone who has assumed that nuclear war belongs to the past will find that assumption hard to keep.

This has been a summary of Nuclear War: A Scenario by Annie Jacobsen, giving you the GIST so you can decide if you want the REST.