It's straight up random. That's the entire point of it. It doesn't judge... or at least that is the intention, but as @nightkami points out, there IS an uncontrollable subconscious with the mind stone.
Anyway.. back to the first part, the snap doesn't care if it destabilizes entire worlds, nor does Thanos. Thanos's logic is SUPPOSED to be like this. On the surface there might be an argument, but if you let it play out... well... genocide. It's close to a eugenics argument, but without the precision.
Anyway.. back to the first part, the snap doesn't care if it destabilizes entire worlds, nor does Thanos. Thanos's logic is SUPPOSED to be like this. On the surface there might be an argument, but if you let it play out... well... genocide. It's close to a eugenics argument, but without the precision.