>>520237863
You seem to think that most of them wouldn't hit something. Missile defenses are laughable, just look at what happened to Israel againsts Irans missiles despite them having the best defense of any country. The US, China and Russia could all fire a single ICBM at each others capital and I can guarantee you that more than one of the MIRVs would hit, because they do so at mach 23+.

The only way to "win" a nuclear war is a decapitation strike where you nuke the the enemy leadership, their replacements, their replacements replacements, their comms and redundancies upon redundancies before they manage to fire their own missiles at you. But this isn't possible because there are too many targets that are too dug in or too mobile. Even if you nuked DC or Moscow now with a suitcase nuke they would still have replacements under a dozen bunkers all with the authority to launch in case the president was unreachable. This is why the cold war never went hot.