Well, I concluded that Marxism was founded by Karl Marx, who was born in Germany and spent his life in Europe, and twisted Hegel and Kant to fit his philosophy. Flavors of atheism sprouted in different places spontaneously; many of them date back to pre-history. You could argue that it originated in Africa, or that the Neanderthals practiced it.
There is a book written by Richard Wurmbrand-Marx & Satan, in which he points out, that although Marx had Christian beliefs growing up, he turned against God later in life and worshipped satan.
Wurmbrand was imprisoned in Europe for 14 years due to his outspoken views on communism.