Does your church have a good leader? Does the company you work for have a good leader? Are you part of an organization that has a great leader? What differentiates a great leader from a good leader? Jim Collins, the author of the book “Good to Great: Why Some Companies Make the Leap… And Others Don’t,” gave a keynote speech at the Drucker Centennial conference last May, in which he gave a look at the differences between good leaders and great leaders. He said that leadership is a hierarchy of capabilities, and leaders become competent at each level before moving on to the next level.