This volumes summarizes historical research on the transnational cooperation and integration of European political parties in the EC in the 1970s. The contributors from different European countries are all specialists in European integration history. Their contributions are based on fresh and unpublished material from European archives. They all underline the significance of the first direct election to the European Parliament in 1979 as a starting point for a more intensive transnational cooperation of European political parties. The integration was retarded, by contrast, by ideological and personal rivalry among the national parties. In English and French language.--