Humans don't need monsters, we can be bad enough to scare imagined creatures.

If a person is just "born evil" that implies they never had a chance to be anything else, that there was never an option for them that didn't involve "evil". If that's the case, aren't they also a victim of "evil"? Their life and path predetermined by a force they can't resist or change.

Seems an awful lot like a theists belief to me...

The idea of evil vs. pure evil makes this poll a bit tricky. It is a subtle change, but an important one in my view. When I taught business ethics, I proposed that good/evil were social constructs to help identify what was acceptable behaviour or how far out of bounds some behaviour is. Using murder as an example... murder (in cold blood) is "evil" but murder (self-defense) can bend the perception for some people, and genocide is almost universally evil. Yet, the occurrence of murder can be rather banal. Yes, a bit of shameless referencing to Arendt's Banality of Evil, but I think it presents some noteworthy thinking points.

I think there is somewhere between the psychology of what can go wrong with people - and average societal expectations - and behavior that is so very far off the normal - that I define it as evil.

I can think of a few authors I've read who research and then write fiction about serial killers... right there I'm very easily convinced of "evil".
It's almost a choice to do wrong knowing it's wrong and not caring.

Still working on that idea though.

I don't believe in anything like "pure evil." I think it's terms like these we use to alienate those who do harm in ways that we don't understand in order to draw lines between them and us, when the truth is likely that they're more alike us than not. People say "Hitler" and "Trump" as examples, but I would bet that either of these men, if you met them without knowing who they were in a one-on-one scenario would come across more normal than you think and that's the scary part. Hitler didn't hypnotize anyone and rise to power. He took advantage of German people's biases and made bigotry palatable enough to gain followers, but we like to pain him as a hate monster which is easier than accept that we can all be manipulated into following someone who has harmful motives. It's why we are in a sticky wicket in America right now. Trump is in power because there are enough people willing to let someone like that rule for their personal gain. Religious leaders embrace him for that "long game" of ending abortions and rich people doing it to stay richer. From their internal perspective, even though it sound deplorable, they're doing it to self-sustain. And I'm not saying I want to relate to these people, because they can suck the dirt from toes for electing a moron, but I'm saying that if I spoke to them, I could probably see their logic. Not agree with it. But see it. There's no such thing as evil or monsters.

Evil doesn't exist neither does goodness, it's a point of View. These points of view have lead to the degradation of society for thousands of years. We are all brain washed into believing into these points of view. If we didn't judge one thing as good or evil. Would it be wrong to go by our animal instincts? Kill off those that make us weak, fight those that would oppress us, as a wolf will fight for dominance and leadership. Hunt for food or fight protect our territory or loved ones. We judge ourselves as higher lifeforms. But we strive against the natural order.