Book excerpt: Leadership has never been more important – and divisive – than it is today. The idea and discourse of the leader remains a critical factor in organizational and societal performance, but there is evident tension between the persistent focus on the critical importance of individual leaders and the increasing emphasis on collective leadership. The Routledge Companion to Leadership provides a survey of the contentious and dynamic discipline of leadership. This collection covers key themes in the field, including advances in leadership theory, leadership in a range of contexts and geographies, leadership failure, leadership process, and leadership development. Topics range from micro studies to wider political analyses of leadership, taking in unusual but important aspects such as portrayals of leadership in architecture, media, and science fiction. Contributions from 61 internationally renowned authors from 16 countries make available the full range of perspectives, approaches, and insights on the idea of leadership. Providing both a social sciences and a psychological approach, these go beyond common themes to offer diverse perspectives on such topics as emotion and leadership, portrayals of leadership. This volume situates leadership debates and evidence within contemporary leadership crises, while ensuring that the explorations of the issues are of enduring relevance. With wide and critical coverage of the key topics and potent contextualization of themes in current events, The Routledge Companion to Leadership is the ideal resource for graduate study in leadership.