>>12313096I'm not sure because so far as I know from what's publicly available about missile arming and firing systems it is essentially utterly impossible to accidentally launch an ICBM.
Assuming you mean somebody mistakes some other object for an ICBM and orders a launch, then it would be the moral responsibility of the person who made the misidentification, not the people who designed ICBMs.
Ironically, ICBMs and the existential threat of nuclear extermination has prevented major wars between the world powers directly, acting in a role to preserve """peace""" .