About the 2 faction problem, theoretically 50% of each faction will be gone. Chances are big that the power balance remains the same. But you can idd argue that making 1 faction completely dissappear is also 50% and statistically possible.

About the influential people (let add geniuses to be complete). Those persons are not unique, nobody is irreplaceable. Someone else will step up to be equally influential, Someone else will figure stuff out.

The reason he choose that action is not to be biased and give everyone an equally 50% chance of survival. In his eyes, a cleaning lady deserves an equal chance to a CEO.

The next generations will bounce back. They will not have experienced the thanos snap.

Thanos; I can understand his reasoning, his solution doesn’t favor anyone either and seemed painless.

Reminds me of this one

https://chat.openai.com/share/f5341665-7f08-4fca-9639-04201363506e