Psychopathy is a personality disorder that has been variously described as characterized by shallow emotions (in particular reduced fear), stress tolerance, lacking empathy, coldheartedness, lacking guilt, egocentricity, superficial character, manipulativeness, irresponsibility, impulsivity, and antisocial behaviors such as parasitic lifestyle and criminality.

So which professions (other than ax murderer) have the most psychopaths? What about the least?