Somewhat ironically I didn't do the chapter justice - I probably oversimplified it.
When I read the first edition of Dorling's book a few years ago I got the feeling he was struggling to articulate some very complex social theory on inequality - with the second edition his ideas are much clearer.
It's next on my list to read properly (by that I mean read/ sum/ apply).
Danny Dorling's well worth checking out - Oxford professor, on-side with the whole Occupy movement a while back.