Modern science shows that violence – not just the result of influence on a person by society, environment, upbringing or simply their personal choice. Primarily, violence is a biological phenomenon – the result of dysfunction of the inhibition mechanism of violence and arising psychopathic predispositions due to this. And John Marshall, a forensic psychologist, writes quite well about the key role of psychopathy in committing violence in one of his articles, which we will now consider in more detail.
Firstly, he mentions the meta-analysis by Brittany Fox and Matt DeLisi from 2019, which considered 29 samples from various countries covering over 2600 murders. The correlation between psychopathy and committing murder was equal to 0.68. For comparison – in medicine a correlation of 0.3 between smoking and lung cancer is already considered significant enough not to be ignored. And the link between psychopathy and murder was twice as strong! What’s more, the more extreme or organized the form of killing is, the more manifestations of psychopathy there are in it.
Moving on to the most relevant studies published this year, Melissa Parker West and her colleagues conducted an analysis of 117 studies on the connection between psychopathy and sexual violence. The correlation was moderate, at a level of 0.35, however it is important to note that it remains stable across various samples, including prisoners in jails and public samples. In medicine, similarly strong will be the link between cholesterol and heart disease. Such results completely destroy the idea that psychopathy has nothing to do with sexual or non-sexual violence. The data indicates the opposite: features of psychopathy significantly increase the risk of violence.
Why is this important? Critics argue that psychopathy – a too vague, exaggerated and useless in practice construct. But the data says something different. Psychopathy predicts murders with an effect size that is very rarely found in social sciences. It predicts sexual aggression at a level comparable to well-established medical risk factors. This makes it one of the most powerful indicators of violence. And the fact that the “average” criminal who has committed murder shows moderate manifestations of psychopathy underlines that this is not just a rare subtype of killers, but a general tendency for all cases of lethal violence.
But what is the practical benefit of such knowledge? Of course its value is not purely academic; it’s useful in assessing and managing risks. For example, we need to understand what measures to take towards a criminal and how suitable he is for returning to society. And if we ignore the factor of psychopathy, we can easily make a wrong answer and issue a blind judgment.
Also, this knowledge is useful in preventing violence. Psychopathic traits don’t arise at one moment when a person turns 18 years old. They can be traced in the individual’s development even in childhood and adolescence, observing their callousness and lack of emotion, absence of empathy and a tendency to manipulative or abusive behavior. It is very important to identify and intervene in the problem as early as possible. Combating these traits before they turn into ingrained adult personality models is one of the ways to reduce the number of future abusers.
Finally, psychopathy doesn’t limit itself to prisons or громкие дела (loud cases) about murders. Many people discover psychopathy in personal life: with partners, colleagues, friends or bosses. The ability to recognize emotional superficiality, pathological lies, manipulation and lack of empathy can protect a person from violence. It is necessary to raise public awareness, which will help people avoid psychopaths and the danger they represent, as well as take the right actions when encountering them!
