Easier to kill her if she’s not in prison maybe.

These numbers are extremely low. We are limited by our diagnostic capabilities, and a lot of psychopathy is simply passed off as narcissism, particularly among non-violent psychopaths.

If a psychopath is intelligent enough to simply get a job on Wall Street then how do we diagnose him? The PCL-22 requires him to engage in extreme behaviors. Following a profit motive doesn’t “count” and neither does voting for Trump.

Psychopathy.

5% of the population is psychopathic. No shame. No fear. No motivations beyond her own amusement. Contrary to popular opinion, she was almost certainly born with the condition.

However, this type of brain damage is a spectrum, and judging by opinion polls and various psychometric data, I would estimate at least 30% of the population to be categorically incapable of moral reasoning.