Sue Ashford, a professor at the University of Michigan's Ross School of Business, breaks down her decades of research on leadership—who achieves it, and how a group grants it. She explains that the world isn't divided into leaders and followers. Instead, it's a state that everyone can reach, whether they're officially in charge or not. She also explains why shared leadership benefits a team and organization. Ashford offers tips on how to effectively grow leadership in yourself and your employees.