I'll have to look at that. I'll admit I've never looked at primary sources relating to that and I've always just taken it as fact that the Japanese were not going to surrender. I just looked at it as a natural progression from losing ten of thousands of men fighting over Iwo Jima and Okinawa to losing millions fighting over territory the size of California.
I always thought the same, as it is one of the most pervasive myths in America, until I read criticisms of the action that referred to the primary sources in great detail. At that point, I was both shocked and disgusted. We simply murdered those people and did so for absolutely nothing.