Tomas Chamorro-Premuzic uses science and tech to help organizations predict human performance. His most recent work has looked at two questions: Why is it so easy for incompetent men to become leaders? And why is it so hard for competent people — especially competent women — to advance? Although men make up a majority of leaders, they underperform when compared with female leaders. When competent women — and men who don’t fit the stereotype — are unfairly overlooked, we all suffer the consequences. The result is a deeply flawed system that rewards arrogance rather than humility, and loudness rather than wisdom.