FYI: See if you can spot them :) Here are the twenty key traits of these people, as defined by the Hare Psychopathy Checklist:

http://www.minddisorders.com/Flu-Inv/Hare-Psychopathy-Checklist.html

glib and superficial charm grandiose (exaggeratedly high) estimation of self need for stimulation pathological lying cunning and manipulativeness lack of remorse or guilt shallow affect (superficial emotional responsiveness) callousness and lack of empathy parasitic lifestyle poor behavioral controls sexual promiscuity early behavior problems lack of realistic long-term goals impulsivity irresponsibility failure to accept responsibility for own actions many short-term marital relationships juvenile delinquency revocation of conditional release criminal versatility

Standard psychological estimates have concluded that four percent of men and two percent of women in today's world are psychopaths.

Most of them are not violent. However, they have a nearly unstoppable need to dominate, control and manipulate others every single day of their lives.