Political Parties and Party System

Abstract This chapter describes the foundation, evolution, organization, and societal connections of Portugal’s main political parties, and reviews the main cleavages and lines of competition of the party system. It argues that Portugal is home to an institutionalized, consolidated, and nationalized party system of moderate pluralism, and that Portuguese parties have an electoral-professional organization with relatively weak roots in society. These features make the Portuguese party system stand out when compared to other third wave democracies, where party systems are generally less stable, more fragmented, and in which political parties include organizations that are less durable and professionalized than in older democracies. Perhaps surprisingly, the Portuguese party system closely resembles party systems in other Western European countries, where democracy was consolidated much earlier than in Portugal.