“The dropping of the [atomic] bomb on a populated center was another totally superfluous crime. Even if callous arguments for the annihilation of Hiroshima could be made, there was no necessity for the slaughter in Nagasaki, cradle of Japanese Christianity. Within a split second the bomb wiped out one-eighth of Japan’s Catholic Christians. Here the argument resurfaces—Truman wanted to impress the Soviets, just as Churchill had with Dresden. But how could any butcher impress the arch-butcher from the Caucasus? Not even the late Adolf Hitler had succeeded.”

Report on the Potsdam Conference (1945)
Context: The world will note that the first atomic bomb was dropped on Hiroshima, a military base. That was because we wished in this first attack to avoid, insofar as possible, the killing of civilians. But that attack is only a warning of things to come. If Japan does not surrender, bombs will have to be dropped on her war industries and, unfortunately, thousands of civilian lives will be lost. I urge Japanese civilians to leave industrial cities immediately, and save themselves from destruction.

&quot;President Truman Did Not Understand&quot; http://www.peak.org/~danneng/decision/usnews.html in U.S. News &amp; World Report (15 August 1960)<br>Variant: If the Germans had dropped atomic bombs on cities instead of us, we would have defined the dropping of atomic bombs on cities as a war crime, and we would have sentenced the Germans who were guilty of this crime to death at Nuremberg and hanged them.<br>As quoted in The Decision to Drop the Atomic Bomb (1996) by Dennis Wainstock, p. 122 <br class="br">Context: Suppose Germany had developed two bombs before we had any bombs. And suppose Germany had dropped one bomb, say, on Rochester and the other on Buffalo, and then having run out of bombs she would have lost the war. Can anyone doubt that we would then have defined the dropping of atomic bombs on cities as a war crime, and that we would have sentenced the Germans who were guilty of this crime to death at Nuremberg and hanged them?<br>But, again, don&#x27;t misunderstand me. The only conclusion we can draw is that governments acting in a crisis are guided by questions of expediency, and moral considerations are given very little weight, and that America is no different from any other nation in this respect.

Now is the Time to Prevent a Third World War (1950)

Source: 1950s, Human Society in Ethics and Politics (1954), p. 47
Context: Suppose atomic bombs had reduced the population of the world to one brother and one sister, should they let the human race die out? I do not know the answer, but I do not think it can be in the affirmative merely on the ground that incest is wicked.

What Does God Want Us to Do About Russia? (1948)
Context: We Christians should urge our government to destroy all its atomic bombs, stop making any additional ones, and stop all preparations to wage war with biological weapons. Such actions would... place our government in an advantageous position to plead with all other nations to join with us in an international treaty of disarmament by as rapid stages as possible.

Conversation with his doctor, Lord Moran (23 July 1945), quoted in Lord Moran, Winston Churchill: The Struggle for Survival, 1940-1965 (London: Sphere, 1968), p. 305
The Second World War (1939–1945)

Announcing the Bombing of Hiroshima (1945)
Context: Sixteen hours ago an American airplane dropped one bomb on Hiroshima and destroyed its usefulness to the enemy. That bomb had more power than 20,000 tons of TNT. It had more than two thousand times the blast power of the British "Grand Slam" which is the largest bomb ever yet used in the history of warfare.
The Japanese began the war from the air at Pearl Harbor. They have been repaid many fold. And the end is not yet.

April 25, 2006
The Areas of My Expertise (2005), Appearances on The Daily Show with Jon Stewart

Public statement quoted in The New York Times (6 October 1945) and in The Decision to Use the Atomic Bomb (1996) by Gar Alperovitz <!-- p. 329 -->
Context: The Japanese had, in fact, already sued for peace before the atomic age was announced to the world with the destruction of Hiroshima and before the Russian entry into war.... The atomic bomb played no decisive part, from a purely military standpoint, in the defeat of Japan.