The Unfinished Nation: A Concise History of the American People, 5/e

Alan Brinkley, Columbia University

Debating the Past

Chapter Twenty-Eight: America in a World at War

Where Historians Disagree – The Decision to Drop the Atomic Bomb

There has been continuing disagreement since 1945 among historians–and among many others–

about how to explain and evaluate President Truman's decision to use the atomic bomb in the war against Japan.

Truman himself, both at the time and in his 1955 memoirs, and many of his contemporaries insisted

that the decision was a simple and straightforward one. The alternative to using atomic weapons, he claimed, was an American invasion of mainland Japan that might have cost as many as a million lives. That view has received considerable support from historians. Herbert Feis argued in The Atomic Bomb and the End of World War II (1966) that Truman made his decision on purely military grounds–to ensure a speedy American victory. David McCullough, the author of an enormously popular biography of Truman published in 1992, also accepted Truman's own account of his actions largely uncritically,

as did Alonzo L. Hamby in Man of the People (1995), an important scholarly study of Truman. "One consideration weighed most heavily on Truman," Hamby concluded. "The longer the war lasted, the more Americans killed."

Others have strongly disagreed. As early as 1948, a British physicist, P.M.S. Blackett, wrote in Fear, War, and the Bomb that the destruction of Hiroshima and Nagasaki was "not so much the last military act of the second World War as the first major operation of the cold diplomatic war with Russia." The most important critic of Truman's decision is the historian Gar Alperovitz, the author of two influential books on the subject: Atomic Diplomacy: Hiroshima and Potsdam (1965) and The Decision to Use the

Atomic Bomb (1995). Alperovitz dismissed the argument that the bomb was used to shorten the war

and save lives. Japan was likely to have surrendered soon even if the bomb had not been used, he claimed. Instead, he argued, the United States used the bomb less to influence Japan than to intimidate the Soviet Union, "to make Russia more manageable in Europe."

John W. Dower's War Without Mercy (1986) contributed, by implication at least, to another controversial explanation of the American decision: racism. The Japanese, many Americans came to believe during the war, were almost a subhuman species. Even many of Truman's harshest critics, however, note that it is, as Alperovitz has written, "all but impossible to find specific evidence that racism was an important factor in the decision to attack Hiroshima and Nagasaki."

The debate over the decision to drop the atomic bomb is an unusually emotional one, and it has inspired bitter professional and personal attacks on advocates of almost every position. It illustrates clearly how history has often been, and remains, a powerful force in the way societies define themselves.

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