Musk shares his fears in a new AI documentary called Do You Trust This Computer?
He is afraid that in contrast to human dictators – who will eventually die – it would be practically impossible to get rid of an AI dictator:
"At least when there's an evil dictator, that human is going to die,” Live Science quotes Musk as saying, "But for an AI there would be no death. It would live forever, and then you'd have an immortal dictator, from which we could never escape."
However, the second law of thermodynamics practically guarantees that nothing we make will last forever, but it will break down – sooner or later.
The only thing that remains is the Bible, the Word of God. And it definitely rules out an immortal AI dictator.
Specktor, Brandon. 2018. Elon Musk Worries That AI Research Will Create an 'Immortal Dictator'. Live Science (8 April).