Milo and I are taking this thread offline and I've included msutto (Maurice) because of his theological interests as well. Anyone is welcome to join the discussion, but my intent was to engage Milo specifically, as he has been a persistent proponent of his own Lucifer theory/interpretation. I've enabled my e-mail reply so if you reply again requesting to be included, I will forward the e-mail.
I've discussed the Urantia Book on this board and introduced some of its pages (some are paraphrased, but most are direct quotations) in various contexts. One example of my own words, but conceptually influenced by this book, is from your post about biblical references to aliens that you posted about a week ago.
Instead of directly answering your question and going into the book's history, I'm going to do a quick search of these message boards and see what comes up. I know I've discussed this question before and maybe I can refer you to several such threads instaed of repeating myself. But I will reply to your question on this particular thread again.
PS I'm actually quite relieved someone replied to this thread because I was summarily rejected from the Mystery Board and was having some mixed feelings.