Little Boy

Little Boy was the world’s first atomic bomb used in combat, a 9,700-pound weapon dropped on Hiroshima from the B-29 Enola Gay. The book’s account gives the bomb a significance beyond its role in that attack: its explosive scale becomes a point of comparison in arguments over whether a thermonuclear weapon could be controlled, deter war, or instead make mass destruction the defining logic of military policy.

Identity and Combat Use

The book identifies Little Boy as the first atomic bomb used in combat and records its weight at 9,700 pounds. It was carried to Hiroshima aboard the B-29 Enola Gay. These concrete details place the weapon in the history of the atomic project as an object built for use and delivered to a city, rather than merely a theoretical possibility or a laboratory achievement.

The supplied account does not detail the bomb’s internal design or its construction. Its description is precise about the facts it does provide: its name, weight, status as the first combat atomic bomb, and the aircraft from which it was dropped. Those facts establish the scale and circumstances of its use without conflating them with the later development of thermonuclear weapons.

A Measure of Thermonuclear Scale

In the General Advisory Committee’s 1949 deliberations, the Hiroshima bomb serves as a measure against which the proposed Super appears almost incomprehensibly large. The discussion gives the Hiroshima bomb an explosive yield of 15,000 tons of TNT and considers a possible thermonuclear yield of 100 million tons. On that comparison, the committee reasoned that a legitimate military target for the larger weapon would be too small: a Super could destroy 150 to 1,000 square miles or more.

The comparison turns Little Boy’s historical scale into a political and moral reference point. The committee’s concern was not only that a thermonuclear bomb would surpass the earlier weapon in destructive power, but that its size would make the distinction between military targets and civilian populations increasingly untenable. The GAC warned that such a weapon might become an instrument of genocide, and argued that even possessing it could damage American security by making the United States appear willing to contemplate devastation on an unprecedented scale.

From One Bomb to a Question of Strategy

The General Advisory Committee did not treat the prospect of a Soviet Super as a reason to build an American one automatically. Its report argued that undertaking a crash program would not deter the Soviet Union from developing the weapon. If the Soviets tested and eventually used a Super, the committee reasoned, the United States could answer with its existing stock of atomic bombs. It hoped that refusing to produce the larger weapon might also reopen arms-control negotiations.

The committee’s alternative was to expand production of fissile material for smaller tactical atomic weapons and strengthen conventional forces in Western Europe. It presented this approach as a more economical and credible defense against a possible Soviet invasion than an escalating contest to accumulate the largest weapons. The proposal was an early expression of nuclear sufficiency: an arsenal sized for particular military tasks rather than enlarged without limit. In that argument, the Hiroshima bomb was both a precedent for atomic warfare and a scale against which the advocates of restraint assessed the next, vastly more destructive step.

The Object in the Politics of Nuclear War

The debate over the Super exposed a conflict between military planning and the attempt to limit the consequences of nuclear weapons. In 1951, J. Robert Oppenheimer was shown an Air Force strategic war plan calling for the obliteration of Soviet cities on a scale that shocked him. In the Project Vista report, he also supported giving tactical atomic weapons a role in a military campaign, as an alternative to relying on city-destroying thermonuclear bombs. That position aimed to resist genocidal strategic bombing, but it carried its own danger: bringing nuclear weapons onto the battlefield could make their actual use more likely and risk escalation into a wider exchange.

By 1953, Oppenheimer was publicly challenging the secrecy surrounding American nuclear strategy. He described a planned massive initial assault and argued that the growing stockpile could not be judged by counting bombs alone: even a much larger American arsenal, he warned, would not necessarily offset a smaller Soviet one in any deep strategic sense. Little Boy is not presented in these later arguments as a complete answer to the politics of nuclear war. It remains the concrete historical point of departure against which the scale, intended use, and consequences of subsequent weapons could be measured.