COMMENT The scene: A multimillion-dollar estate somewhere in the Santa Barbara environs. I’m imagining lush lawns, manicured gardens and a sweeping mansion only slightly smaller than the Louvre. Inside a group of well-dressed 30-40-50-somethings gather; the mood is warm, excitable; the canapes, organic; the wine, a premier cru. And the reason that the great, the good and the simply ultra wealthy have decided to go out on a school night to dodge Gwyneth Paltrow and her latest theory about gluten? A British Prince of the Realm who just published a 400-page book that reads like the longest break-up letter in...