Maybe show us the part where thermonuclear war is beneficial for the survival of the species?!
There seems to be more at work here than survival of the...well anything!
Evolution is just a scientific explanation of our ancestry.
Psychologically, humans today are almost the exact same as 3000 years ago.
The only difference is that 3000 years ago, the "war technology" was sticks and stones. Today, it's guns, F16's, bombs and nuclear technology.
At the same time, human society has become a lot more moral and
humane. Today, there's a lot more compassion, solidarity and respect for humanity.
Back in the days that you idolize, people were stoned to death in public for rather trivial things.
Today, we even protect the human rights of serial killers in the civilized world. We don't kill them in the streets. We lock them up and try to treat them as a human (providing shelter, food, medical treatment etc).
It's a myth that there is more hatred and war today then 1000s of years ago.
The opposite is true.
Yes,
even considering the 2 world wars from last century.