European union movements played a central role in promoting a "Europeanmodel of society", a humane industrial relations system, high labor standards, generous welfare states, and collective political representation which reached its pinnacle in the post-World War II era. The recent shift to lower growth, rising unemployment, renewed European integration, neo-liberalism, and globalization has challenged this "European Model" and the unions' place in it. These essays, written by some of the leading scholars in the field, examine responses of six major European union movements to the dramatic changes in economic and political conditions in the last two decades. They are the result of a group research effort and are based on a common framework which lends it quite an exceptional coherence.