to give his more prestige
Quite a statement for Marx to make...that evolution was the basis for his theory...only for prestige. I guess you are a Freudian too and can guess his motives rather than believe that his words might come from a sincere compliment to a like-minded thinker?
Okay, let's cut to the chase: Feel free to describe *how* evolutionary biology actually gives any support to communism. We'll wait.
And no, the usual canard about how they're both "based on atheism" doesn't count, because they're not. Evolutionary biology makes no statement either way about the existence of God(s), and is entirely compatible with the existence or intervention of a deity. Communism, meanwhile, is "atheistic" only in the sense that it advocates suppressing religions in order to "avoid competition" with the communist state, but it is entirely compatible with the existence of God (i.e., all of Marx's "justifications" for communism are based on arguments of necessity and charity and so forth, not based on any "since there is no god, then..." arguments). One can believe in God and still think that communism is a workable or desirable economic system -- it's not *predicated* on the premise that no deity exists.
So go for it -- by what line of argument do you think evolution in any way supports communism? This should be amusing.