Would someone please define "a work of high literature" objectively, together with suitable metrics for measuring this, rather than trotting out the collective perceived wisdom of a bunch of snooty academics or critics.
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People have been trying to define art for centuries. I don’t think we’re going to get a breakthrough on TrekBBS.
In general, high literature tends to focus more on themes than plot. You read something like Herzog or Mrs Dalloway and not a lot happens, but that’s not why it’s enjoyable. And yes, you’ll tend to find those novels discussed academically since they’re influenced by different aspects of literary theory, especially when you get to modernism and postmodernism.
I’m not saying Dune isn’t fantastic, but it isn’t generally regarded as ‘high literature’.
Just by the by, most literary academics aren’t snooty at all. You get one or two lecturers who fit the bill, but they don’t sit around laughing at genre fiction or anything.