[elmer fudd]

"Though the genes in question have yet to be identified, this result suggests they are too abundant to be there by chance—in other words they are being kept in the population by natural selection because psychopathic behaviour confers a selective advantage. If it does, such an advantage probably pertains only when psychopaths are in the minority (a state of affairs known to biologists as a balanced polymorphism). But it does mean that far from being an aberrant behaviour, psychopathy may be disturbingly normal."

This is the part I found most interesting. The rest of it seemed more like common sense. Everyone who has been around babies knows they are born with their own personalities and dispositions.

[hardworking]

I agree with you. In fact, I have had a personal experience with a relative who, over the years, I came to believe was seriously psychopathic and had no conscience, yet there was absolutely no evidence of childhood mistreatment, or other evidence of a seriously dysfunctional family. The behavior of this individual was so devious, cunning and destructive that I concluded this individual needed either very serious psychological treatment, or an exorcism, and I am not kidding. This is very serious stuff.