>>1315Japanese sent surrender requests mutliple times before the nukes were dropped, the firebombing of Tokyo and other cities were way more devastating than the nuclear bombs when it came to civilian casualties.
The bombs were dropped so the US military could use their new toy they wasted so much budget on. Could you imagine the embarassment? Japan gains a conditional surrender and the whole Manhattan project was just a gigantic waste of money? It's worse when you consider the Japanese surrender terms, which are the same that the US occupation authorities granted to Japan, which were:
Let the emperor stay as ceremonial head of state,
Let the Japanese war criminals off the hook and
Accept Japanese overseas claims on some islands
Then there was the problem that the US had only fissile material for only three bombs, only uranium and two plutonium, and all three were used in the end, one test and two detonations over civilian cities with no military importance, which shows that it was rushed to be used.
Thankfully the Soviets finished their invasion of Manchuria at that point, or else there would've been an American occupied northeastern China in the worst case or the whole Korean peninsula under US hegemony.
Talking about the Soviets, the bombs were also used as a threat against them, in a grand showcase that the psychopathic US was ready to mass murder their enemies and poison the land with fallout for millions of years to come.
Your other point about the Fermi Paradox, it's more likely that we are the first, there is a serious lack of radio waves trashing through the universe, but nukes are a dangerous great filter. Let's see if the USA can step down without taking the whole world with them.