Columbia subject headings:
Harvard subject headings:
Conservatism
Nationalism
Populism--Europe.
Populism--United States
Radicalism--Europe.
Radicalism--United States.
Right and left (Political science)--Europe.
Right and left (Political science)--United States.
Right-wing extremists--Europe
Princeton subject headings:
Conservatism.
Nationalism.
Populism--Europe.
Populism--United States.
Radicalism--Europe.
Radicalism--United States.
Right and left (Political science)--Europe.
Right and left (Political science)--United States.
Right-wing extremists--Europe.