Answer:
In his famous petition to President Truman, physicist Leo Szilard argued that scientists who helped create the atomic bomb would bear a moral responsibility for any destruction it caused. Szilard believed that scientists should consider the consequences of their inventions and take responsibility for the ethical implications of their work.
Physicist Edward Teller believed that nuclear weapons would have a deterrent effect on future wars, making them less likely to occur. He argued that nuclear weapons could be used to prevent wars, rather than to fight them. Teller also believed in the concept of "nuclear superiority," which meant that a country should have more nuclear weapons than its potential enemies in order to maintain peace.
President Truman's justification for dropping the atomic bombs on Japan was based on the belief that it would end the war quickly and save American lives. While Truman did not explicitly endorse either Szilard's or Teller's views, his decision to drop the bombs suggests that he saw the atomic bomb as a necessary evil in the context of a larger conflict. In terms of moral responsibility, Szilard's view is closer to Truman's, as both believed that the creators of the bomb bore some responsibility for its use. However, Teller's belief in nuclear deterrence may have influenced Truman's decision to use the bomb as a means of ending the war quickly and preventing further conflict.