Master of Disaster
I'm not an expert on psychopaths but I remember reading, amongst other books on the subject, Harvey Cleckley's "The Mask Of Sanity" and Alan Harrington's book "Psychopaths" a while back. If they and others (such as Elton MacNeil, who also wrote about a sociopath he knew) are right, psychopaths would be a very bad bet to have on your side because they have no conscience or sense of loyalty. They'd sell you out the first chance they got.
Yep. The defining characteristics of the psychopath are that (1) he cares only about himself, and (2) he is totally willing to harm anybody else if it benefits him, or allow harm to anybody else if intervening would not personally benefit him.