There are many articles and quotes that elaborates difference between a manager and a leader. The most concise and accurate in my view are presented by Dwight Eisenhower and Peter F. Drucker.
Leadership is the art of getting someone else to do something you want done because he wants to do it – Dwight Eisenhower
Management is doing things right; leadership is doing the right things – Peter F. Drucker
Managers essentially helps aligned teams achieve desired result by providing input required by the team. However if the team has different intentions then the manager would either fail or become a situational leader, thus aligning intention of the team.
Having zeroed in on the core fundamental activity of a leader, the next question is how could one align intention of a bunch a people, creating teams out of them? Well these simple practices could help:
- State your intentions from start and communicate it continually
- Hold your intentions with high integrity (walk your talk) and demonstrate it whenever possible
- Inspire the team with content that justifies your intentions and invite debate with members who disagree
- Get clear commitment from the team on their alignment
- Be prepared to remove people who do not align even after several effort
For People to Trust You, Reveal Your Intentions: http://blogs.hbr.org/hill-lineback/2012/04/for-people-to-trust-you-reveal.html