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A sociopath (or antisocial personality disorder), as defined by, is :

a person, as a psychopathic personality, whose behavior is antisocial and who lacks a sense of moral responsibility or social conscience.
Typically a person must possess very specific behaviors to be deemed a sociopath. The following characteristics are typical of a sociopath: -They are manipulative. Everything is about them and they are willing to do anything which they see as self-serving. -They possess a grandiose view of self. They believe that they are always in the right and that it allows them to always justify behaviors. - They are pathological liars. They have no problem telling lies about anything, no matter what the level of the lie. -They have no emotions which relate to shame or guilt. Given they they possess a grandiose view of self, any behavior which they partake in they deem right. Others, in the mind of a sociopath, are not like them- therefore, they can be treated in any way the sociopath deems necessary; and they feel no remorse for their actions upon others. -They lack emotions. They see emotions as manipulatives. Therefore, they do not trust the emotions of others nor can others trust the stated emotions of the sociopath. -They are impulsive. Give they believe in their own power only, they have impulsive behaviors led by their irrational internal emotions and feelings. -Typically, sociopaths partake in obsessive and violent behaviors such as promiscuity and addictions. -Above all, they do not believe that there is anything wrong with them. *****This list contains a limited list of defining characteristics of a sociopath. Please do not use this list to diagnose self or others.