Markis Marxism - Is There a Class Struggle?

The idea that there's hierarchical competition among human beings, there's evidence for that that goes back at least to the paleolithic times. And this never seems to show up in marks. It doesn't show up in markis marxism in general. It's as if nature doesn't exist. The primary conflict, as far as i'm concerned, or a primary conflict, that human beings engage in, is the struggle for life in a cruel and harsh natural world. We make our social arrangements, at least in part, to ameliorate that as well as to exasperate it.