Punishment is ineffective for changing the behavior of people with dark traits, especially psychopathy, as their brains are less sensitive to negative consequences. They are, however, highly responsive to rewards. The best approach is to actively reward any positive behavior you want to encourage.

Contrary to the popular belief that power corrupts, research suggests it acts as an amplifier. If a person is already "pro-social"—oriented towards helping others—power can increase their empathy and effectiveness. If they are selfish, power will magnify those negative traits.

Companies often cannot differentiate between healthy confidence and narcissism. Narcissistic individuals excel at self-promotion and appearing decisive, which are frequently misidentified as leadership qualities, leading to their accelerated advancement over more competent but less self-aggrandizing peers.

Contrary to the stereotype of the self-obsessed egotist, many high-achievers are motivated by a deep-seated need to please others and prove their worth. This drive for external validation fuels their relentless pursuit of excellence.

While related, narcissism and psychopathy have different core motivations. A narcissist's engine is grandiosity at the expense of equality—they need to be on top. A psychopath's engine is the exploitation of others at the expense of any sense of honor or human value. They see people as objects, not inferiors.

While psychopathic and narcissistic traits help politicians attract followers and media attention, these same traits make them less influential in Congress. Colleagues find them difficult to collaborate with, hindering their ability to get bills passed.

The romanticized idea of not caring what others think is fundamentally anti-social and prevents personal growth. Empathy and the ability to internalize feedback are core human skills; a genuine inability to do so is a clinical trait, not a sign of strength or leadership.

The CIA intentionally hires individuals who can navigate ethical ambiguities without being crippled by remorse, a trait they observe is common among successful CEOs who often make ruthless decisions to advance their careers and are not full sociopaths.

Inexperienced professionals often mistake the correlation between talent and abrasive behavior for causation. In reality, success provides a buffer that allows talented people to be jerks without immediate consequences; the bad behavior itself is not a component of their success.