Introduction: Parties and Transnationalism Party, Nation-State and Beyond: Some General Considerations From the Internationals to the Transnational Party: A Historical Perspective Social Democracy: Riding the Tide of Globalization Christian Democracy and its Allies: Identity and the Logic of Numbers Liberals and Democrats: In the Shadow of the Heavyweights? The Communists and Allies: Still Fighting for Change Defending the Periphery, Protecting the Environment: The Regionalist Family and the Greens Sovereignists, Sceptics and Populists: As Transnational as the Rest? National Parties, Party Families and their Roads to Transnationalism: A Comparative Conclusion