The next stage of US history will see the ultimate merger of state power, corporate power and human psychopathy, foreboding a new level of ruthless and calculated exploitation.

Psychopaths tend to get what they want and feel no remorse. However, they have superficial relationships characterized by lies and manipulation. So are they happy?

Can dogs have excessive and irrational fears? Sometimes there's nothing to fear itself -- even for a dog ....

If children with antisocial tendencies could be raised in a loving atmosphere or receive early intervention, perhaps full-blown psychopathic and violent tendencies might be curbed.

How do we define and understand the Machiavellian approach to life? Is it a personality trait or a belief system? What does psychology have to say about this 500-year-old concept?

Psychopathy, a trait associated with antisocial qualities, may show up in a prosocial form among creative people. New research shows the physiology supporting this intriguing link.

The basic principles of social influence and persuasion are effective tools for predators.

New studies of internet trolls show they are sadistic, psychopathic, and enjoy being cruel to others.

Reducing the unacceptably high number of mass murders and other types of violence in the US will require multiple methods. Prevention through Behavioral Health methods is one.

Some serial killers find justification and solace in heady philosophical notions.

Genetic developmental disorders of the brain are usually considered incurable. But recent results suggest that, in Rett's syndrome at least, this may not be the case.

Stress can alter the rhythm of the body, particularly because it changes the daily pattern of the hormone cortisol. This may be why it also increases the risk of mental illness

The neurodiversity movement must work to define itself and address the differences of harmful individuals.

New book in a series about Canadian crimes revives interest in psychopathic child killer from 1950s.