This book analyses the Europeanization of the Portuguese political system in the context of globalization and the so-called Third Wave of Democratization. It pursues the thesis that democratization and Europeanization are two intertwined processes in the case of Portugal. Integration into the European Union has changed considerably the rationalities within the political structures of the Portuguese political system. Furthermore, the author stresses the necessity to encourage greater political participation of the population and to evolve towards a project of sustainable democracy.