Michael Mann is one of the most influential sociologists of recent decades. His work has had a major impact in sociology, history, political science, international relations and other social science disciplines. In this volume, his work has been systematically and critically assessed by distinguished scholars who take stock of Mann's overall method and of his account of particular periods and historical cases. This timely volume also contains Mann's reply where he answers his critics and forcefully restates his position. It will appeal to scholars across the social sciences.