WWI and WWII didn’t have nukes.
Today the average Joe is aware, even in the US, that given the right enemy, they are not untouchable.
The casualness by which people make decisions for war are over since both in the political sphere and layperson there is an awareness that if you push things to far, you’ll end up with mutual destruction.
We have been in the era of “limited warfare” for a long time, all the Cold War (which wasn’t really all that cold given all the proxy conflicts) is an example.
Again this is the pre-WW1 mentality that “it would be so destructive it would never happen”.
The Bible speaks of End Times with wars and rumours of wars, and armies of 200,000,000.
Modern weapons and gigantic alliances don’t make big wars “impossible”. They just make them more destructive when they do come.
The idea that that we have returned to an era of 18th century “Cabinet War” is just a cope.
https://bigserge.substack.com/p/the-end-of-cabinet-war