The University of Notre Dame Press is pleased to bring Ernst Haas’s classic work on European integration, The Uniting of Europe, back into print. First published in 1958 and last printed in 1968, this seminal volume is the starting point for anyone interested in the pre-history of the European Union. Haas uses the European Coal and Steel Community (ECSC) as a case study of the community formation processes that occur across traditional national and state boundaries. Haas points to the ECSC as an example of an organization with the “power to redirect the loyalties and expectations of political actors.” In this pathbreaking book Haas contends that, based on his observations of the actual integration process, the idea of a “united Europe” took root in the years immediately following World War II. His careful and rigorous analysis tracks the development of the ECSC, including, in his 1968 preface, a discussion of the eventual loss of the individual identity of the ECSC through its absorption into the new European Community. Featuring a new introduction by Haas analyzing the impact of his book over time, as well as an updated bibliography, The Uniting of Europe is a must-have for political scientists and historians of modern and contemporary Europe. This book is the inaugural volume of Notre Dame’s new Contemporary European Politics and Society Series.