
Debate over the atomic bombings of Hiroshima and Nagasaki
Substantial debate exists over the ethical, legal, and military aspects of the atomic bombings of Hiroshima and Nagasaki on 6 August and 9 August 1945 at the close of World War II (1939–45).
On 26 July 1945 at the Potsdam Conference, United States President Harry S. Truman, British Prime Minister Winston Churchill and President of China Chiang Kai-shek issued the Potsdam Declaration which outlined the terms of surrender for the Empire of Japan. This ultimatum stated if Japan did not surrender, it would face "prompt and utter destruction".[1] Some debaters focus on the presidential decision-making process, and others on whether or not the bombings were the proximate cause of Japanese surrender.
Over the course of time, different arguments have gained and lost support as new evidence has become available and as new studies have been completed. A primary focus has been on whether the bombing should have been categorized as a war crime and/or as a crime against humanity. There is also the debate on the role of the bombings in Japan's surrender and the U.S.'s justification for them based upon the premise that the bombings precipitated the surrender. This remains the subject of both scholarly and popular debate, with revisionist historians advancing a variety of arguments. In 2005, in an overview of historiography about the matter, J. Samuel Walker wrote, "the controversy over the use of the bomb seems certain to continue".[2] Walker stated, "The fundamental issue that has divided scholars over a period of nearly four decades is whether the use of the bomb was necessary to achieve victory in the war in the Pacific on terms satisfactory to the United States."[2]
Supporters of the bombings generally assert that they caused the Japanese surrender, preventing massive casualties on both sides in the planned invasion of Japan: Kyūshū was to be invaded in November 1945 and Honshū four months later. It was thought Japan would not surrender unless there was an overwhelming demonstration of destructive capability. Those who oppose the bombings argue it was militarily unnecessary,[3] inherently immoral, a war crime, or a form of state terrorism.[4] Critics believe a naval blockade and conventional bombings would have forced Japan to surrender unconditionally.[5] Some critics believe Japan was more motivated to surrender by the Soviet Union's invasion of Manchuria and other Japanese-held areas.[6][7]
US public opinion on the bombings[edit]
The Pew Research Center conducted a 2015 survey showing that 56% of Americans supported the atomic bombings of Hiroshima and Nagasaki and 34% opposed.[214] The study highlighted the impact of the respondents' generations, showing that support for the bombings was 70% among Americans 65 and older but only 47% for those between 18 and 29. Political leanings also impacted responses, according to the survey; support was measured at 74% for Republicans and 52% for Democrats.[214]
American approval of the bombings has decreased substantially since 1945, when a Gallup poll showed 85% support while only 10% disapproved.[215] Forty-five years later, in 1990, Gallup conducted another poll and found 53% support and 41% opposition.[215] Another Gallup poll in 2005 echoed the findings of the 2015 Pew Research Center study by finding 57% support with 38% opposition.[215] While the poll data from the Pew Research Center and Gallup show a stark drop in support for the bombings over the last half-century, Stanford political scientists have conducted research supporting their hypothesis that American public support for the use of nuclear force would be just as high today as in 1945 if a similar yet contemporary scenario presented itself.[216]
In a 2017 study conducted by political scientists Scott D. Sagan and Benjamin A. Valentino, respondents were asked if they would support the use of atomic force in a hypothetical situation that kills 100,000 Iranian civilians versus an invasion that would result in the deaths of 20,000 American soldiers. The results showed that 59% of Americans would approve of a nuclear strike in such a situation.[217] However, a 2010 Pew survey showed that 64% of Americans approved of Barack Obama's declaration that the US would abstain from the use of nuclear weapons against nations that did not have them.[218]