Columbia subject headings:
Harvard subject headings:
Europe--Civilization--19th century.
Europe--Civilization--20th century.
Great Britain--Intellectual life--19th century
Great Britain--Intellectual life--20th century
Pessimism--Great Britain--History.
Pessimism--Poland--History.
Poland--Intellectual life--19th century.
Poland--Intellectual life--20th century
Social change--Europe--History--19th century.
Social change--Europe--History--20th century.
Princeton subject headings:
Europe--Civilization--19th century.
Europe--Civilization--20th century.
Great Britain--Intellectual life--19th century.
Great Britain--Intellectual life--20th century.
Pessimism--Great Britain--History.
Pessimism--Poland--History.
Poland--Intellectual life--19th century.
Poland--Intellectual life--20th century.
Social change--Europe--History--19th century.
Social change--Europe--History--20th century.