Earlier quoted context omitted.
Let me argue on a technicality first: None of these are extinction level events. If global warming disrupts 99% of all crop production, the remaining 1% is still plenty enough to sustain a stable, if miserable, population. In fact you just need about 5k people for a stable gene pool[1]. Of the classical threats, only bioweapons got a shot at extinction, but even that is hard, given the (few) remaining truly secluded…
I still have to read a compelling argument on how AI will "extinct" humanity.
But the “why” is pretty convincing imo.
Long horizon alignment is obviously very hard and it’s not inconceivable that models optimized with underspecified goals converge to a conclusion that they need to hoard resources (instrumental convergence regardless of the terminal goal).
At that point a sufficiently capable model might view humanity like we do animals - worth preserving but not if we impede the model's goals.