I used to perform volunteer work in an asylum. It was an old Kirkbride building where people were still separated into wards, with the farther wards being the most "insane" or "retarded" or whatever the current, yet soon to be scrapped for something more politiaclly correct, term is. In any case, I was walking through one of the outer wards with a couple of the orderlies, and the residents were quite interested in someone from the "outside" visiting them. One of the orderlies asked me if I was afraid to be in there. I asked why I should be. He wondered if it bothered me to be surrounded by insane people. I told him that the only reason these people were in there was because there are more of us than there are them. In there, we were the insane. One the other hand, it was somewhat distracting to hold a Bible Study with "God" continually correcting you and saying either "I did NOT say that", or "that is NOT what I meant".
In any case, it seems logical that the DSM-V does not list psycopathy as a disorder because it is not one. It is more a reaction to an existing disorder, at least as I have been taught. As an example, I am the grandson of a Nazi. Like many of the Nazis, there is a battle within me between extreme cruelty and compassion. Himler, who oversaw the death of millions, would get sick if you spoke about hunting during dinner. Like many of them, I naturally segregate groups and individuals, and see them completely different. I would have no problem ordering a group to their death. However, I am moved to tears by the suffering of an individual. Most would say this is a disorder. I am one of those. That is why I am not considered psychotic. I can tell right from wrong, and can understand that some of my "natural" tendencies are wrong, even if it is not by concience but by some other outside force. A psychopath cannot make this distinction.