Book excerpt: In Sustainable Leadership, Andy Hargreaves and Dean Fink address one of the most important and often neglected aspects of leadership: sustainability. The authors set out a compelling and original framework of seven principles for sustainable leadership characterized by Depth of learning and real achievement rather than superficially tested performance; Length of impact over the long haul, beyond individual leaders, through effectively managed succession; Breadth of influence, where leadership becomes a distributed responsibility; Justice in ensuring that leadership actions do no harm to and actively benefit students in other schools; Diversity that replaces standardization and alignment with diversity and cohesion; Resourcefulness that conserves and renews leaders' energy and doesn't burn them out; and Conservation that builds on the best of the past to create an even better future. This book is a volume in the Jossey-Bass Leadership Library in Education—a series designed to meet the demand for new ideas and insights about leadership in schools.