Comeback_Kenwyne
Striker
Any scenario like this is basically end of the world stuff. You only need about 50+ modern sized nukes (100-1000 times bigger than Hiroshima) to go off at the same time to wipe out 80-90% of life on earth out via a nuclear winter...If Putin launched a nuclear strike on the West he'd become a suicide bomber. He's clearly f***ing bonkers but there's no evidence that he has a deathwish.
Sort of like how a comet crash in Mexico killed all the dinosaurs, the dust clouds block out the sun for long enough to fuck us all. Better under the bomb, frankly.
Anyway, any scenario where he nukes a country like Britain clears that threshold, almost certainly.