Which is not to say that the atomic bombs were less horrible. For a variety of reasons, the odds of someone surviving an atomic attack were much lower than even the first, largest firebombing attacks. I have written about this: blog.nuclearsecrecy.com/2014/09/22/t...
How many people would have died if an atomic bomb had been dropped on Tokyo in early 1945, instead of firebombs? And why does it matter?