Web searching for Leadership and Renunciation, I got lots of spiritual stuff. Plus commentary on Sonia Gandhi renouncing leadership.
Renunciation/Affirmation - A Vaisnava-Christian Dialogue
Price of Leadership: Emulation and Envy
S Leelavathi, India Times
Web searching for Burning Ones Bridges, I find lots of material advising against it. Web consensus (thanks to Google) is to leave your options open But then Google merely leads us into thinking with the majority.
The emphasis here is on what the leader renounces for himself or herself - including leadership itself. But my interest is on what the leader renounces on behalf of the group - deliberately closing down options in order to increase the focus and commitment of the group.