Columbia subject headings:
Civilization--Philosophy--History--19th century--Congresses.
Degeneration--History--19th century--Congresses.
Europe--Civilization--19th century--Congresses.
Progress--History--19th century--Congresses.
Harvard subject headings:
Civilization--Philosophy--History--19th century--Congresses.
Degeneration--History--19th century--Congresses.
Europe--Civilization--19th century--Congresses.
Progress--History--19th century--Congresses.
Princeton subject headings:
Decadence in literature.
Europe--Civilization--19th century.
Literature, Modern--19th century--History and criticism.
Progress.