[sadhorse]

Psychopathy is also on a normal distribution... this "big numbers" argument is very weak. We all know what the masses like to do with the environment.

[GeoAtreides]

More people also mean a bigger, smarter pool for recruitment into mental health professions. Again, the key word is massive parallelism: more people working in specialised fields, at the same time. And there are A LOT of specialised fields nowadays.