Narcissism is perhaps the oldest of recognized personality disorders, as Greek and Roman poets had given us the myth standing behind it, and were musing about it 2000 years ago. Psychopathy is also one of the more established personality disorders, but has practically disappeared from the Diagnostic and Statistical Manual of Mental Disorders. Learn why in this Advanced Reading article (geared for psychology professionals).

In 1980, as the DSM was struggling to successfully launch a personality disorder it could call its own, another significant figure came on the scene—the Canadian-born psychologist, Robert D. Hare …

The initial contentions between Cleckley and Hare’s construct of psychopathy, and the DSM’s construct of antisocial personality disorder seemed mostly about the former construct assessing traits, while the latter stressed behavior. And over which was more or less useful …