Most people think they are, you know. Look over your shoulder. As simplistic as that may seem, it's an accurate test. Relationships determine the morale of the organization. Structure determines the size of the organization.
Vision determines the direction of the organization.
Leadership determines the success of the organization. Leading other people is truly a tremendous calling. A real leader has the ability to awaken individuals to possibilities that they don't see at all. Leadership is really a ministry of service to the possibilities in other persons. Robert Greenleaf has written about the servant role of the leader in his work The Servant as Leader.