Horrifyingly, drones are already being used as nuclear weapons. The Russians recently 'leaked' a new torpedo design with all the characteristics of a drone, being able to find its way through thousands of miles of ocean, finding a target and if this target is acceptable destroying a whole harbor zone. Doomsday drones --or machines if you will-- are likely already in place and able to decide to blow up the world in an instant. I don't like thinking about the capability of these superpower nations.

Also submarine launched radio controlled "drones" carrying nukes have been around since 1955.

https://en.wikipedia.org/wiki/SSM-N-8_Regulus

The only reason why it's called "cruise missile" is because it's self destructing. That's hardly of any tactical importance when talking about nukes.

> Doomsday drones --or machines if you will-- are likely already in place and able to decide to blow up the world in an instant.

What do you base that on?

No facts, only that it's relatively easy to implement such a system. Add to this the fear that the other party may have implemented a doomsday device, and it becomes easy to rationalize the need for such a device.

I would even argue the operators in nuclear bunkers are already part of a doomsday device if they have orders to automatically launch an attack if their country has been struck by nuclear weapons.