The realist school of thought advocates anarchy and fighting for one's own selfish reasons in order to preserve the interests of the nation. On December 7, 1941, after the Japanese Air Force attacked Pearl Harbor in Hawaii, the United States military was taken by surprise, turning the attention of the entire nation against Japan. President Harry S. Truman made the decision in 1945 to attack Japan with nuclear bombs first at Hiroshima and then three days later at Nagasaki. A few days later, Japan surrendered and World War II came to an end. Realist specialists claim that the decision taken was unnecessary. The number of deaths between the two cities was around 200,000, in Hiroshima there were 90,000 deaths and in Nagasaki 37,000 deaths, not counting the deaths of the wounded and nuclear contamination. Although people generally think of realism as being about power, strength, and attack, they knew at the time that Japan had been defeated before the bombs were dropped. Truman's chief of staff, Admiral William Leahy, stated in his memoirs that "the use of this barbaric weapon at Hiroshima and Nagasaki was of no material assistance in our war against Japan." . The Japanese were already defeated and ready to surrender. » One of the main reasons for this attack was to prove to the Soviet Union that we possessed nuclear weapons and were not afraid to use them against our enemies. The main excuse given was that the destruction of the two cities minimized the American military losses that would have been caused by the war battles. At this time, General Eisenhower expressed his feared opinion on this devastating decision, with Secretary of War Henry L. Stimson believing that this strategic decision was necessary to defeat Japan. Eisenhower thought otherwise, he even tried... middle of paper... other powers did it too. The Non-Proliferation Treaty was created to diminish the nuclear weapons of the original five states (United States, Russia, China, France and the United Kingdom) and prevent other states from acquiring them. Realists believe that there is no higher power that should control or regulate a state. Ironically, the United States encouraged the development of these weapons and is now focused on preventing them. The bombing in Japan has opened a Pandora's box and raised fears about the future. The NPT goes against rational actors: if one state seeks to acquire nuclear energy, why should others not have the same level of defense mechanism? At least the NPT allows nuclear energy enrichment. Japan is… Many realists say that alliances are not normal and that once the goal is achieved, the union disappears. The new nuclear age creates additional concerns from non-state actors..