[Question] What is the strongest case for nuclear weapons?

I recently finished the Doomsday Machine by Daniel Ellsberg, which makes an extremely persuasive case against nuclear weapons (IMO). I’ve heard that some academics argue that nuclear weapons have been a good deterrent to great power conflict or that the US should spend billions to modernize its arsenal for command and control reasons.

What are the strongest arguments/​pieces of evidence for views like this?

I basically think that the risk from accidental launch → global thermonuclear war is high enough to offset a lot of great power deterrence, in expectation.

No answers.