...

Umm are you having problems posting?

Yup. Female psychopaths do exist, but are far rarer than the male. Something to do with the innate empathy of the female required to successfully rear children I guess. Evolutionary theory would suggest that female psychopathy would tend to be maladaptive - would tend to be selected against more strongly than male psychopathy.

It's been suggested on the basis of game theory (Psychopathy = the cheaters strategy)that male psychopathy could be adaptive up to a small percentage of the population. Above that percentage it becomes maladaptive as the non-psyhopathic portion of the population becomes conscious of the cheats in their midst and goes en garde against them...

This is an interesting idea, but Im not advocating it! heres an overview of work done in this area
http://www.human-nature.com/nibbs/01/psychopathy.html