Was the u. s justified in using atomic bombs to end the world war 2?

The dropping of the atomic bomb on Hiroshima was justified at the time as being moral – in order to bring about a more rapid victory and prevent the deaths of more Americans. However, it was clearly not moral to use this weapon knowing that it would kill civilians and destroy the urban milieu. And it wasn’t necessary either.

It taught people how to live a good life, but not what to believe.