I believe I and my brother are alive thanks to the two atomic bombs being dropped on Japan. Our small town, North Dakota dad graduated from high school six months early in order to join the Army Air Corps. Became a weatherman on a B-29 crew, flying through typhoons and atomic bomb blasts in the South Pacific. Had Japan not surrendered, he would have been there in a B-29 until the war ended or he ended.
The other thing dropping Fat Man and Little Boy did, was to prevent the Soviets from occupying at least half of Japan which, no doubt, would have led to a Korea-like Civil War, that we would have been involved in.