Columbia subject headings:
Harvard subject headings:
Europe--History--1789-1900--Philosophy.
Europe--History--20th century--Philosophy.
Europe--Intellectual life.
Ideology--Political aspects--Europe.
Revolutions--Europe--Philosophy.
Princeton subject headings:
Europe--History--1789-1900--Philosophy.
Europe--History--20th century--Philosophy.
Europe--Intellectual life.
Ideology--Political aspects--Europe.
Revolutions--Europe--Philosophy.