How does Amy Edmondson define leadership?

According to Amy Edmondson, while there are many definitions of leadership, she prefers defining it as 'the ability to harness the efforts of others to achieve greatness.' Leadership is fundamentally about making a difference and creating outcomes that wouldn't otherwise happen. Leaders are inherently vulnerable to others' willingness to contribute not just effort, but also ingenuity, heart, and soul to a collective purpose. True leadership inspires voluntary commitment, prompting the question: for whom would people willingly work hard, stretch themselves, and fully engage under various conditions?