Claiming that our nature makes inevitable that societies require some significant portion of their constituents to suffer is not simple description, it's a conceit that, like most naturalistic fallacies, is consistently used to excuse and justify existing social order.
If you eradicate violence then those who love violence will suffer. You can't please everyone. This is not a normative claim, it's a fact of individuality. If your Utopian society is free of violence, then you must exclude people who love violence. How you accomplish this without committing violence is another matter.
you must admit the fundamental contrast to something like Moore's Utopia
I don't, actually. More was every bit a critic of his contemporary society as Marx was of his. The difference between More and Marx is that More was one of the most brilliant rhetoricians of all time. Taking the form of a Socratic dialogue, Utopia employs a pair of interlocutors, one of whom is the author himself, in order to present a critique of enclosure and the excesses of nobility that flew right over most nobles' heads. To call it "primarily concerned with describing the order of its hypothetical ideal" is to completely miss the author's point. I suggest you read it again.
If you eradicate violence then those who love violence will suffer. You can't please everyone. This is not a normative claim, it's a fact of individuality. If your Utopian society is free of violence, then you must exclude people who love violence. How you accomplish this without committing violence is another matter.
you must admit the fundamental contrast to something like Moore's Utopia
I don't, actually. More was every bit a critic of his contemporary society as Marx was of his. The difference between More and Marx is that More was one of the most brilliant rhetoricians of all time. Taking the form of a Socratic dialogue, Utopia employs a pair of interlocutors, one of whom is the author himself, in order to present a critique of enclosure and the excesses of nobility that flew right over most nobles' heads. To call it "primarily concerned with describing the order of its hypothetical ideal" is to completely miss the author's point. I suggest you read it again.