When it comes to persusaive–or just merely instructional–texts, I tend to ask myself whether:
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[li]An author knows his audience;[/li][li]The writing is lucid;[/li][li]He uses an economy of words;[/li][li]He supports his claims with facts and cites[/li][/list=1]
My personal feeling is that, since you have a rather thorough background in English (which usually includes many, many hours of literature dissection), you’re experienced enough to understand Wilber’s concrete writings. My guess is that, if he’s anything like Zukav, it’s his vague, off-handed writings that confuse you. You’re looking for intellectual meaning and he’s churning out non-specifics that’d have Nostradamus saluting in awe.
There’s a difference between “dense shit” (:)) and disinegenious; I feel Zukav, James Redfield, and others of their ilk fall into the latter category. They seem to eschew facts in favor of unsupported conjecture. It’s easy for them to respond to criticism of their vague ramblings with “Sure, it can mean that. And this, this, this, that and that, too.”
For better understanding, though, I say if one is really interested in gleaming the intentions of a writer, one should look to the writer’s critics. I think the critics (whether they be wrong or right) may provide a different view that could help you better understand the original text.
As for: “Where he discusses Derrida, a bit closer to my field, I notice he is careful to note the limits of deconstruction, with which Derrida would not agree, yet uses the parts that seem to bolster his thought.”
I do think you point out a common practice of these charlatans, which is to pick and choose from science (or other disciplines), buffet-style, to give their silliness some level of credence. They’re wrong to do so, but their supporters either don’t notice or don’t care about that intellectual fraud and dishonesty, and the writers sell enough books to make a profit, so why should they stop?
Personally, philosophy-wise, I think they’re wannabes (or, worse, pretenders in the game just for the money). I’m happier with Aquinas, Russell, Hobbes, Socrates, Kant and Nietzsche (and, of course, others). I’m not saying I agree with them, but they do prove to be a better class of thinkers. YMMV. 