Columbia subject headings:
Communism.
Critical theory.
New Left.
Philosophy.
Radicalism.
Right and left (Political science)
Harvard subject headings:
Communism
Critical theory
New Left
Philosophy
Radicalism
Right and left (Political science)
Princeton subject headings:
Communism.
Critical theory.
New Left.
Philosophy.
Radicalism.
Right and left (Political science)