The analysis of party systems in Western Europe has long constituted a major focus of concern in comparative political science. Now for the first time, many of the classic writings in this field have been collected into a single volume. The collection contains seminal writings by Weber, Neumann, Duverger, Kirchheimer, Daalder, Rokkan, and Sartori, as well as a selection from the more recent debates on changes in European party systems, including the contributions of Pedersen, Wolinetz, and Inglehart. The writings cover the development, stabilization, and transformation of party systems and include some of the key analyses which have sought to distinguish between different types of party systems.