For many years there has been a debate over whether the United States should have dropped the atomic bomb on Japan at the end of World War II. These debates began long before the decision by President Harry S. Truman to drop the bomb among the scientific community who understood the gravity of the disaster and political fallout as a result. It is clear that the American government had to dehumanize the Japanese in order gain public support for dropping these weapons. This paper traces how the United States government and scientific community constructed and contested “truth” about nuclear weapons between 1945 and 1954. It examines how secrecy, moral justification, and ideological control shaped the narrative from Hiroshima to the hydrogen bomb decision.

This paper explores how the atomic bombing of Hiroshima in 1945 not only marked a transformative moment in military and political history but also set a lasting precedent for modern global risk. By examining the implications of Hiroshima, this paper will delve into how the initial decision to use nuclear force instigated a high-stakes period of unprecedented risk management that extends to today's geopolitics, nuclear proliferation, and even international policy on climate and technology. This presentation will argue that the atomic history of Hiroshima established the world’s first encounter with existential weaponry and its accompanying ethical challenges, thereby laying the foundation for a modern understanding of high-stakes governance. In our current “perilous present,” Hiroshima's legacy offers crucial lessons on the dangers of technological advancement without global ethical oversight.