"we must never allow psychopaths to gain power again"

100% agreed. This is a core issue. Sociopaths need to be contained while we attempt to re-acclimate them to society; while psychopaths (to the extent distinguishable from sociopaths) need to be contained, period.

A second core issue is the accumulation of power, which IMO is essentially the accumulation of technology, in all its forms. We may be reaching a dangerous watershed in which technology is simply too advanced for humans to handle. In psychopathic/sociopathic hands, it eventually leads to an extinction-level event; which one or group "wins the lottery" TBD. Combined with surveillance, you can start seeing this with AI robot dogs with mounted guns roaming the streets; now on the battlefield, soon to a city near you.