In 1945, the United States possessed the monopoly on the new atomic bomb. The new weapon was very powerful which brought the ending of the War II. In 1949, along with the Soviet Union exploding the first atomic bomb, a big cold war appeared between the two superpowers. They had a very vehement arms race. During the race a large of nuclear weapons were invented. These became a big threat to our society if we couldn’t use them in good way, even destroyed our earth.
In my opinion the atomic bomb’s appearing was symbol of the new times’ coming. It promoted people into the new times. Although it was a big threat to our society, if we could use it in a good way, it will bring a lot of advantages to the global development.