Columbia subject headings:
Democracy--Europe.
Europe--Foreign relations--21st century.
Europe--Politics and government--21st century.
Geopolitics.
Nationalism--Europe.
Political culture--Europe--21st century.
Populism--Europe.
Harvard subject headings:
Europe--Foreign relations.
European Union countries--Foreign relations.
Geopolitics--History--21st century.
International relations--History--21st century
World politics--21st century
Princeton subject headings:
Democracy--Europe.
Europe--Foreign relations--21st century.
Europe--Politics and government--21st century.
Geopolitics.
Nationalism--Europe.
Political culture--Europe--21st century.
Populism--Europe.