Real progress!

[Purple Rabbit]

Anyway, if it came to a nuclear war, both sides would be destroyed.

Precisely why we need to keep nukes as long as our enemies have them. If we go down, we take them with us.

Well, if the world is precisely split in two opposing camps, perhaps. Of course there are more players in the game. And with more players in the game the result is not that predictable as you suggest. In fact it has been argued that detente is an illusion in these situations. That it will become unstable soon with devastating outcome.