Organizations aren’t getting the performance they need from their teams. That’s the message we hear from many of our clients, who wrestle with complex challenges ranging from strategic planning to change management. But often, the fault doesn’t lie with the team members, our research suggests. Rather, it rests with leaders who fail to effectively tap diverse work styles and perspectives—even at the senior-most levels. Some managers just don’t recognize how profound the differences between their people are; others don’t know how to manage the gaps and tensions or understand the costs of not doing so. As a result, some of the best ideas go unheard or unrealized, and performance suffers.