Sorry posted too soon .
I honestly believe there is such a thing as " evil" .
It's what causes cruelty to animals.
It's the thing that causes one human being to hurt another .
It's what causes some men to rape and abuse .
It's what causes child neglect and cruelty.
It's what causes wars
It's what causes pervasive and unrelenting discrimination against others that are " different" , be it because of race religion gender disability or economic status.
I don't believe one thing causes or prevents it .
Not every child who suffers abuse ,cruelty and a harrowing childhood grows up to be a killer . Most dont.
Many people thought to be " evil " have had good lives , been brought up in loving homes , with kind and thoughtful parents , but they still end up twisted and wanting to hurt others . Loads of people do this on a small scale ( not just killing people ) , like abandoning or neglecting their children , or battering their partners or cheating on them (too many things to list tbh iykwim ). Because this is common it's sort of overlooked as being " evil " , but is this intentionally causes hurt and pain to others , (which is the point of " evil ". )
When you look at it this way it's a sliding scale of nasty selfish or cruel behaviour , the " evil" people are just at the high end of that scale .
Something has went wrong somewhere so they have lost the ability to keep their own ego in check and to think of others as equally as important as themselves . When they lost the ability to think about other people having feelings and worth, they view them as objects with no real value except as " toys " for amusement ...and they lose respect for life .
Sometimes , I see children with an astounding capacity for cruelty , but when you look at their parents you see they act in a similar fashion. Who knows if it's something genetic that's passed down or bad behaviour that's never been chastised ?
When you read about evil , it is almost given that somewhere amongst the words there will be startling similarities between people who have committed these acts of evil ...usually a few dictators and mass murderers will be compared. However given that in history those that were quite willing to do whatever they felt neccessary quite often ended up as kings or leaders , it's a questionable job requirement . How many ancient monarchs murdered to get to and stay in power ...not all inherited the title .
Perhaps the " evil " was a requirement of survival left over from days of early man where being " evil" ensured that you stayed alive , and were allowed to produce offspring . Problem is there is no such requirement for violent nasty behaviours anymore , but now and again a throwback emerges and turns " evil", when in the " right" conditions ( or wrong , depending how you look at it).
It must be a combination of factors that creates evil , so whilst some people may be born with the potential to become truly evil at the top end of the scale , thankfully ,relatively few actually do .