Yesterday I examined Darwinism, the anti-morality which accepts that might makes right. It occurs to me that this is closely related to the "historical inevitability" claimed by Marxists and used as a justification for Communism.
Fortunately, they were egregiously wrong in practice; but the theoretical sleight-of-hand behind this justification is interesting. A system of government which explicitly rejects God, and seeks to reshape society, cannot then claim any moral basis for its actions in the existing world. By embracing the fallacy of Darwinism, Marx and later Lenin coolly finessed this problem, feeding it its own tail. Communism was inevitable because it was for the good of mankind, and its goodness was in turn evidenced by that same inevitability.