Perhaps, but the USSR declared war on Aug 7. Hiroshima was Aug 6. Japan surrendered Sept 2.
Also consider. The USSR declared on Aug 7 because they wanted to get their bite out of Japan before it was too late. So in some sense the bomb hastened their entry, which hastened the end of the war...
All I can say is, I'm glad I'm not the one who had to make these decisions in real time.
Maybe. I think it's more complicated than that. And there were leaflets dropped to warn about the fire bombings. There might've been leaflets for the atomic bombings too.
The fire bombing of Tokyo, which was the deadliest of the entire war (including Europe) and happened in March, didn't convince the Japanese government to give up. The Atomic bombs dropped in August and there was plenty of bombing in between.
I think most historians agree it was really the Soviet Union entering the war which finally created a good enough consensus for Japan to surrender. Even then there were plenty that wanted to keep going.
Even in hindsight it's very hard to say what the right answer was, which is why it's still debated even today. Probably there was no right answer.
Also consider. The USSR declared on Aug 7 because they wanted to get their bite out of Japan before it was too late. So in some sense the bomb hastened their entry, which hastened the end of the war...
All I can say is, I'm glad I'm not the one who had to make these decisions in real time.