Peter Kuznick was the director of the Nuclear Studies Institute at American University. He said to the president: ”He knew he was beginning the process of annihilation of the species. It was not just a war crime; it was a crime against humanity."
Maps of the devastation and the weapon that caused it First Atomic Bomb Format of the First Atomic Bomb
"We have discussed among ourselves the ethics of the use of the bomb. Some consider it in the same category as poison gas and were against its use on a civil population. Others were of the view that in total war, as carried on in Japan, there was no difference between civilians and soldiers, and that the bomb itself was an effective force tending to end the bloodshed, warning Japan to surrender and thus to avoid total destruction. It seems logical to me that he who supports total war in principle cannot complain of war against civilians."
By: Father John A. Siemes (works at a Catholic University).
The Americans decided to bomb Japan with the Atomic bombs to avoid being attacked and to protect lives of American soldiers. It is estimated half of our men, a number approaching about half a million people, would have died invading Japan.
There were no good solutions to end the war, given Japan’s willingness to accept a tremendous amount of casualties in continuing their war efforts.
Moreover, the enemy now possesses a new and terrible weapon with the power to destroy many innocent lives and do incalculable damage. Should we continue to fight, not only would it result in an ultimate collapse and obliteration of the Japanese nation, but also it would lead to the total extinction of human civilization. Such being the case, how are We to save the millions of Our subjects, or to atone Ourselves before the hallowed spirits of Our Imperial Ancestors? This is the reason why We have ordered the acceptance of the provisions of the Joint Declaration of the Powers.
That speech was released on the radio and ended the invasion and the war.