The root(s) of all evil?
Power lust, envy, money, egotism might be good places to start imo.
Edit to add vanity.
What do you think?
I would not profess to know all of the roots of evil, but, IMHO, ignorance is high up in the list.
In another thread, there is discussion about “evil” in the context of the Southport Murders. While I agree these are horrific, I equally find it beyond my understanding that “normal” everyday people can commit some terrible acts, against large numbers of their fellow human beings. Then, in some cases, the perpetrators return to “normal” daily life.