I read a book written by a combat infantryman who fought on the last islands before the mainland Japan. It was gruesome. Nobody is an angel in war but some of the things that the American soldiers witnessed was like living in hell. The Japanese were never going to surrender the conventional way without thousands maybe hundreds of thousands dying needlessly.

Those two bombs probably kept the world somewhat peaceful for the last 65 years, meaning no real superpower has dared to engage.

God help us if some renegade country develops and uses a bomb of that magnitude in the future.