Columbia subject headings:
Communism and religion--Germany--History.
Germany--History--1871-1918.
Protestant churches--Germany--History.
Socialism--Germany--History.
Harvard subject headings:
Communism and religion--Germany--History.
Germany--History--1871-1918.
Protestant churches--Germany--History.
Socialism--Germany
Socialism--Germany--History
Princeton subject headings:
Church and social problems--Germany--History--19th century.
End of the world.
Eschatology.
Forecasting.
Protestant churches--Germany--History--19th century.
Revolutions.
Social prediction.
Socialism.