This obviously was not the primary reason of dropping the bomb, but it might have been considered a welcome side effect. The bomb would serve the double purpose of ending a war as well as an impressive demonstration to the world of the United States’ dominating power.
Another reason is the whole Manhattan Project. America spent roughly two billion dollars on the research and development of the atomic bomb, and now that an enemy was attacking our country, it made sense to use it. The U.S. was not callous in its deployment of the bomb; it gave the Japanese the chance to surrender at the Potsdam Conference, warning them of the power of the new “special bombs.” However, the emperor publicly refused when the terms of the Potsdam declaration text were leafletted into Japan. Due to this refusal, the bombs were dropped. (National Archives Petition to the President)
Given Japan’s no-surrender mentality of battle, incredibly aggressive form of fighting, and expansionist nationalism, it appeared highly unlikely to the United States that the Japanese would surrender anytime soon. Japan had been offered a peaceful surrender, and had refused. Therefore, in order to save as many American lives as possible and to end the bitter war as quickly as possible, the bombs were dropped. The outcome of the bombing was an immediate success, with the Japanese surrendering only six days