... if organizations want leaders to drive change, they would be well advised to hire moderate misfits rather than candidates who are a perfect fit for the current culture. A carbon copy of the rest of the team could perpetuate rather than disrupt the status quo. At the same time, hiring people who are radically different will rarely generate the desired change. More likely, these leaders would end up disrupting only themselves.

Fundamentally, coaching is not pure science. It is partly an art, which explains the huge variability in effectiveness between different coaches. The success of coaching will largely depend on the talent and skill of the coach, and individual coaches’ characteristics and behaviors have been found to matter more than does the coaching method.

A controlled experimental study of 1,361 global corporation managers showed that feedback-based coaching increased the managers’ propensity to seek advice and improved their subsequent performance one year later.

In sum, bad leaders are unlikely to turn into talented, inspirational, or high-performing leaders. Yes, they can change, but most leaders won’t improve much beyond what you have seen them do in the past, especially if they are left to their own devices. Human inertia makes professional development interventions, such as executive coaching, indispensable, though a much more effective strategy for improving the quality of leaders would be to focus more time, effort, and resources on selecting talented people into leadership roles. As in any other area, prevention is a much better option than treatment, and while there’s no need to choose between one and the other—both should be pursued—leaders will be much more likely to improve when they have been correctly selected.

Doing so [taking a critical look at a company’s leadership] will create the collateral benefit of boosting the proportion of women in leadership. Incidentally, this path will also increase the representation of competent men in leadership roles, as men too are currently disadvantaged by the same toxic criteria that stop talented women from becoming leaders.