Columbia subject headings:
Harvard subject headings:
Democracy--European Union countries
European Union countries--Economic integration--Congresses.
European Union countries--Foreign relations--21st century--Congresses.
European Union countries--Politics and government--21st century--Congresses.
European Union--History--21st century--Congresses.
Political participation--European Union countries
Right and left (Political science)--History--21st century.
Socialist parties--European Union countries.
Princeton subject headings:
Democracy--European Union countries.
European Union countries--Politics and government.
European Union.
Political participation--European Union countries.
Right and left (Political science)--History--21st century.
Socialist parties--European Union countries.