Burns suggests: Leadership must be judged by the actual social change measured by the intent and by the satisfaction of human needs and expectations.
Power vs Leadership
Leaders have power but people with power may not have leadership. In power relationships, there is a P (power holder) and R (power recipient). Power is a relationship so it is a collective and not the behavior of one person. Leadership over human beings is exercised when persons with certain motives and purposes mobilize resources to arouse, engage, and satisfy the motives of followers.
Transactional vs Transformational
Transactional leadership is when one person initiates an exchange that both people are conscious of. There is no enduring purpose. In transformational leadership people engage with each other in a way that leaders and followers raise one another to higher levels of motivation and morality.