[header] How to understand and help sociopaths [title] Understand the features of sociopaths. [step] These individuals defined as a personality disorder, characterized by persistent antisocial behavior, impaired empathy and remorse, and bold, dis-inhibited, egotistical traits. [substeps] Sociopaths are rational, know why they decide to act the way they do. 
The reasons behind sociopathic behavior is due to brain structure, although there are an interplay of genetics and environment. It can also be caused by brain injury.