In Hiroshima, what is author Hersey's viewpoint on the atomic bomb?

Hersey's account of August 6, 1945 and the years that
followed in no way gloss over the horror and terror of that day on the people of
Hiroshima and Japan.  This reflects his, and many others', view of the atomic bomb as a
weapon that could destroy the world, as a weapon that is rightly
feared.

That being said, Hersey does not sensationalize his
account either.  This is one reason why Hiroshima is a
well-reviewed work, it successfully conveys that terrible day without appeals to emotion
or fear.  Hersey felt hopeful that mankind could avoid nuclear holocaust, and perhaps
even move beyond having nuclear weapons someday.  This attitude, reflected in his
account, is important at the time because during the Cold War, many people believed
nuclear war was inevitable.  Hersey believed this was not so.