Evil- first the distribution of narcissism and sociopaths in society is pretty predictable at least I guess so. Next human tribes can adapt myths. Some are beneficial like the believe in a business contract offers protection in your investment of money. And the value of money if based on faith in a society..
Ok getting to evil. Mass hysteria (another name for myths) can be conjured up by a narcissist/ sociopath and enforce by a small segment of society.
Germany’s myth about Hitler, Japan’s belief about their superior race were both destroyed. Replacing both were unique cultures that have contributed good, not evil, benefits to man kind.

Will evil exploit a human eco system in the future? We face that very issue here in the US with the Evils of Christian Natioalism replacing separation of state and religion with their myth driven by MAGA cult lead by a narcissistic and evil person called Trump.