Small Waves said:
That would be a decent argument if you could prove that without the bombing any of those things would have actually happened. If they were invaded, they wouldn't be wasting their time killing prisoners if they could spend it fighting off the threat at hand. There's no way to determine if Japanese citizens that are strangers to the battlefront would have done anything but hide, retreat, or surrender. It also wouldn't have left a small portion of the country uninhabitable due to nuclear fallout and caused generic defects to the children and children's children to those exposed that will be around for God knows how long. The fact that Japan doesn't hold a tenth as much resentment for America as it should is unbelievable.
The bombing was nothing but a senseless slaughter with no regards for future consequence, and we didn't learn our lesson since we used chemical warfare in future wars that still have an impact on the land and people. There's a damn good reason why nobody uses nuclear weapons. Today, atomic bombs are only good for bluffing, as nobody would be stupid enough to use them.
There is one place in japan that has the right type if coastline for a massive scale invasion, and only one place where it was feasible to deploy paratroopers in any significant numbers, where they were in a position to link up with the beach head or take strategic objectives. The Japs knew this, and any invasion of the mainland would have cost a far greater number of lives than were lost to the bombs.
Also, most pows captured by the japs were not held in japan, and japan had significant forces in both china (roughly 85% of japans forces were deployed in china), indochina and malaya. These were in a position to massacre pows, and i wouldn't put it past them either.
As to your point about the civillians, look at the island of saipan where the civilian population committed suicide en masse rather than be captured by the yanks. The people of the mainland were being given basic training in fighting with wooden sticks etc. We re talking about a highly militarised society with an unshakable faith in their emperor, and would not surrender.
This would lead to bitter street fighting in the cities, guerilla style attacks in the hinterland, and horrific casualties for both sides. There would also have been widespread destruction to all of japan and not just those two areas. War doesn't leave pretty green fields and woods behind it. It would have taken a massive effort to restore japans arable land and would have cost far more than the americans would be willing to give them, leaving much of japan, to all intents and purposes, uninhabitable.
WAs it right? No. Was it necessary? yes.
To paraphrase clausewitz, war should be total.
i don't know what is more total than nukes.