The oddest thing that stands out to me about Marxism is that it's widely regarded as a scientific, materialist philosophy; but, evolutionary psychology will always inevitably kill Marxist revolutions.
What we've already seen in Marxist experiments, particularly like the Kibbutz, is that people get on board with the idea that the children that they create, and that women carry in their wombs for nine months, only to go through the pain of child birth, aren't actually theirs -- until they actually have a kid.
A lot of people are credulous.
When they join into these communes, they're under the impression that they'll have a whole village to help raise and nurture their children. Only, it's a lie. In these communities, your children aren't yours. To say that this is "Your baby." breaks the communist mold.
Maternal instincts are a biological fact. Our overwhelming desire to pass our genes into the next generation and protect that investment of time and love and emotion and money and energy are built into us from the bottom up. It's the reason why we're a successful species in the Darwinian sense.
It's delusional to think that you'll condition these biological instincts out of the human mind in a century or two.
What a laughing stock these people are to claim that they can't define what a woman is without being a biologist while perpetuating an ideology that does force us to go against our most basic biological impulses.