The U.S. should not have dropped the atomic bomb on Japan. The U.S. shouldn"t have because it killed tens of thousands of civilians. Also it destroyed their economy that they had before the war. In Fact the Japanese even hoped for a negotiated peace and a conditional surrender, and the Americans only demanded for the unconditional surrender of Japan. The use of the atomic bomb was unethical and immoral as if created a new meaning of total war by destroying thousands of civilians in grotesque manner.
If the U.S. would not have dropped the bombs, there would have been more deaths than what the bombs did. The Japanese were not looking for a treaty, they wouldn't give up and would have killed more people.