Again quite arguable, but this is the real life scenario we’re living in. Nukes have made it hard to impossible for super major powers to go in direct conflict with each other.

Except it's pretty well documented (and this is total conjecture, but if you ask me, there are probably are a bunch of undisclosed cases) to have had a good amount of close calls. With the fire-on-warning stance many powers have, it doesn't take an attack, but just enough of the appearance of it to trigger a response.