historian
and philosopher whose interests also included mathematics
, science
, and art
. He is best known for his book The Decline of the West
(Der Untergang des Abendlandes), published in 1918, which puts forth a cyclical theory
of the rise and decline of civilization
s. In 1920 Spengler produced Prussiandom and Socialism
(Preußentum und Sozialismus), which argued for an organic, nationalist version of socialism and authoritarianism.
There is no proletariat|proletarian, not even a Communism|Communist movement, that has not operated in the interests of money, and for the time being permitted by money – and that without the idealists among its leaders having the slightest suspicion of the fact. 
One day the last portrait of Rembrandt and the last bar of Mozart will have ceased to be — though possibly a colored canvas and a sheet of notes will remain — because the last eye and the last ear accessible to their message will have gone.
Long ago the country bore the country-town and nourished it with her best blood. Now the giant city|city sucks the country dry, insatiably and incessantly demanding and devouring fresh streams of men, till it wearies and dies in the midst of an almost uninhabited waste of country.
Christian theology is the grandmother of Bolshevism.
Marxism is the capitalism of the working class.
This is our purpose: to make as meaningful as possible this life that has been bestowed upon us; to live in such a way that we may be proud of ourselves; to act in such a way that some part of us lives on.