Hope you don't mind if I jump into this one. I find it really interesting.
Also... you used the word spectrum in relation to psychopathy. Do you see "good" and "evil" as opposite regions of a spectrum? If so, is there such a thing as 100% "good" and 100% "evil?
Interesting question. I would say that the answer depends on how we define the parameters. If we're looking at it from the perspective of
moral relativism, then the answer would be "No". However if we look at it from the perspective of Evil as an objective stimulus that we as humans can sense, then the answer is most probably "Yes". This latter perspective is less popular. But I think there is something to it.
And to be fair, I see a spectrum and my spectrum is open ended in that I can see that which I would call "good" becoming ever "gooder" as life evolves, as we evolve.
I think that "gooder" can apply in the same way as a level of luminosity. As an analogy, if darkness is evil and light is good, we can imagine two opposing conditions ( darkness and light ) each defined by the complete absence of the other, resulting in the hypothetical possibility of a situation consisting of 100% good or 100% evil.
However. most situations in our experience aren't all #000000 or all #FFFFFF ( the hex values for pure black and pure white ). They're some combination where there is room to get brighter or darker, better or worse.
And I shy away from the word "evil"
I don't shy away from the word "evil". If you can sense it, then you know it's something that requires attention. However I would say that the phrase "use with caution" is appropriate.
but I certainly would say there's the other end of the spectrum from what I would call "good" (I just like a different word).
Nothing wrong with being an optimist on the side of light.
If you share this view, where is the magic line where everything above in the spectrum is "good?"
Q. Where is the magic line?
A. In your heart.
I would not be comfortable in stating to another where than line is as
It might not always be comfortable, but it's a conversation worth having.
I hold it is each person's personal responsibility to make those calls (and change their views as they grow or regress).
On making the calls, you are quite correct. However that doesn't mean we don't have a responsibility to help people understand the questions and become more aware of the consequences of their decisions. It's not an easy thing, and your reservations indicate a level of wisdom
not possessed by those who tend to make hasty moral judgements.
An oft quoted source of cultural illustration on this subject ...