Try reading The Mask of Sanity http://en.wikipedia.org/wiki/The_Mask_of_Sanity http://en.wikipedia.org/wiki/The_Mask_of_Sanity (The External Links section at th

Try reading The Mask of Sanity http://en.wikipedia.org/wiki/The_Mask_of_Sanity http://en.wikipedia.org/wiki/The_Mask_of_Sanity (The External Links section at the very bottom has a link to a PDF.) The author describes a number of case studies of what he calls psychopaths who are neither dangerous nor offensive to the society around them.