Here is what we know now: the United States and Russia each have an actual Doomsday Machine… These two systems still risk doomsday: both are still on hair-trigger alert that makes their joint existence unstable. They are susceptible to being triggered on a false alarm, a terrorist action, unauthorized launch, or a desperate decision to escalate. They would kill billions of humans, perhaps ending complex life on earth.
Does any nation on earth have a right to possess such a capability? A right to threaten—by its simple possession of that capability—the continued existence of all other nations and their populations, their cities, and civilization as a whole?