I argued that the underrepresentation of women in leadership was not due to their lack of ability or motivation, but to our inability to detect incompetence in men. When men are considered for leadership positions, the same traits that predict their downfall are commonly mistaken—even celebrated—as a sign of leadership potential or talent.

...you have probably experienced a particular form of bad management displayed by bosses who seem unaware of their limitations and are clearly and unjustifiably pleased with themselves. They are overconfident, abrasive, and very much in awe of themselves, particularly in light of their actual talents.

...we choose leaders by how confident they appear rather than by how confident or competent they are, we not only end up choosing more men to lead us but ultimately choose more-incompetent men.

Finally, good leadership requires psychological capital, that is, how individuals will lead and whether they will make use of their capabilities.

Summing up, if someone has the right intellectual capital, social capital, and psychological capital, they will have more potential to be a good leader. But it’s not guaranteed.