There is a world of difference between the personality traits and behaviors it takes to be chosen as a leader and the traits and skills you need to be able to lead effectively.

Why we love psychopaths: Let us now turn our attention to the other major dark-side trait. Psychopathy is often discussed in connection with leadership, particularly when it comes to famous political and business leaders. Unlike narcissism, which is widespread, psychopathy is rare. And yet few toxic character traits have attracted as much public fascination and media attention as psychopathy has—even though only about 1 percent of the general population is thought to have psychopathic tendencies.

Interestingly, toxic cultures can be regarded as the product of psychopathic leaders, because leaders tend to create cultures in their own image. In that sense, psychopathy is self-perpetuating.

To be clear, many charismatic people are neither psychopathic nor narcissistic, in the same way that many psychopathic and narcissistic people have absolutely no charisma. But when these darkside traits are lubricated with charisma, they can make leaders pretty lethal. The more we rely on charisma as a marker of leadership potential, the more we risk ending up with toxic leaders who are exploiting their charms and influence to grab power and manipulate their followers.

More precisely, traits such as confidence, narcissism, psychopathy, and charisma advance individuals’ careers without improving the success of the groups they lead. Clearly, we would be better off if we sifted out individuals with such traits, as opposed to rewarding them. The success of teams and organizations is more important than an individual’s personal success, especially when individual victory harms the rest of the group.