#machiavellianism

#machiavellianism

Narcissistic personality disorder (NPD) is linked to insomnia due to rumination on self-image and hyperarousal.

Dark personality traits in leaders—psychopathy, narcissism, Machiavellianism, sadism—produce manipulative, insensitive behavior that harms employees and can enable abusive supervision.

Hyperthyroidism is associated with higher psychopathy, Machiavellianism, and sadism, along with greater antagonism and reduced empathic functioning.