The Communists decried Darwin's theory of evolution through natural selection as too capitalistic with its uneven distribution of resources and focus on individual success or failure.
Nazis banned Darwin's books in Germany, and wanted to kill Jews to “avenge my saviors blood upon the cross” to hear Hitler tell it.
Eugenics were practiced in ancient Sparta, and is not supported by anybody who understands biology and evolution to know what the term “antagonistic pleiotropy” means.
Both Marx and Engles were Darwinists, as was Lenin. Yes, Stalin favored Lysenko’s even more crackpot ideas, but they were actually in vogue at the time, as most much of the global scientific community was ditching Darwinism in favor of other theories of evolution because it simply didn’t add up. Darwin was of course later restored to his rightful place of Communist honor a decade or so after Stalin’s death. Bottom line: whether it was Marx, Engles, Lenin, or Stalin...they all sought to replace God with one materialist form of evolution or another...just as the Evos are doing now.
For the record, I have a doctorate of philosophy.
http://www.conservapedia.com/Communism
“Communism is based upon Marxism, a philosophy which uses materialism to explain all physical and social phenomena. The theory of evolution influenced the thinking of the Communists, including Marx, Engels, Vladimir Lenin, and Joseph Stalin.[9] Marx wrote, “Darwin’s book is very important and serves me as a basis in natural science for the class struggle in history.” Marx offered to dedicate the second German edition of his polemic “Das Kapital” to Charles Darwin, but Darwin declined the “honour.” [10] [11]”