[harimau777]

Personally, I think that people take the wrong lesson away from Hiroshima and Nagasaki.

WW2 was fought under the doctrine of "total war". All of a society's resources; including civilians and industry, were part of your war effort. That in turn meant that civilians and industry were considered legitimate military targets. Under that doctrine, Hiroshima and Nagasaki were legitimate targets. If the atomic bombs hadn't been dropped, then the alternative was not that those cities stayed standing. The alternative was that the cities would be carpet bombed.

Personally, I think that the lesson that we should take away is not so much that dropping the atomic bombs was wrong; rather it's that the doctrine of total war that made dropping the atomic bombs permissible was wrong.