It is difficult to compare and rank mental health conditions as "worse" because each of these terms describes a specific set of behaviors, traits, and personality characteristics associated with certain mental health disorders. Moreover, the severity and impact of these disorders can vary greatly from person to person. Let's briefly look at each term:
Psychopath: "Psychopath" is not a formal psychiatric diagnosis but is often used colloquially to describe individuals who exhibit a cluster of traits, including a lack of empathy, remorse, and conscience. In the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), these traits are encompassed by the diagnosis of Antisocial Personality Disorder (ASPD). People with ASPD or commonly referred to as psychopaths may engage in impulsive, manipulative, and often illegal behaviors. The severity of ASPD can vary, and not all individuals with ASPD are violent or dangerous.
Sociopath: "Sociopath" is also not a formal psychiatric diagnosis and is often used interchangeably with "psychopath." Both terms are associated with ASPD and refer to individuals who display a disregard for the rights and feelings of others, as well as a lack of empathy and conscience. The distinction between psychopathy and sociopathy is not well-defined in the medical literature.
Malignant Narcissist: "Malignant narcissist" is not a specific psychiatric diagnosis either, but it is used to describe individuals who have traits of Narcissistic Personality Disorder (NPD) combined with manipulative, exploitative, and even sadistic tendencies. People with NPD have an inflated sense of self-importance, a need for excessive admiration, and a lack of empathy. The term "malignant" suggests a particularly harmful or toxic form of narcissism.
In terms of harm to others and society, individuals with any of these traits or disorders can have a negative impact on those around them. They may engage in harmful behaviors, manipulate others, and lack empathy, leading to significant emotional, psychological, and sometimes physical consequences for their victims.
It's important to note that individuals with these traits or disorders are not inherently evil or irredeemable. While they may present challenges in relationships and society, some individuals with these conditions can respond to therapy and treatment. However, it is essential to recognize the potential risks associated with specific personality traits and seek professional help if you or someone you know is experiencing distress due to these behaviors.