Some people are changing as they embrace tech. Sadly there will always be that portion that will resist change. as for why there is less war. Is it not perhaps the fear of a fiery atomic death?
I believe that we will eventually stop fighting over cultural differences, but other struggles will rise up. We are already seeing the resistance against things like VR, AI and Bio-augmentation...
Fiery atomic death definitely plays an important role. For the first time ever, the sociopaths who send other people's sons and daughters to die might actually die themselves. That gives them pause.
So true.