Here's what conservative columnist Jack Hunter recently had to say about The Primal Blueprint , a book advocating the "paleo diet" or "caveman diet" (a diet of mostly meats and vegetables): In its philosophy, the Primal Blueprint is essentially a conservative diet. Author and Primal Blueprint creator Mark Sisson says, "Forget everything you thought you knew about diet, exercise, and health. It's time to go back to the beginning." He believes that the "experts" at the Food and Drug Administration, with their food pyramid and nutritional advice about what constitutes a well-balanced meal, are full of it. According to Sisson, "The Primal Blueprint is validated by the magnificent 2-million-year scientific study that is human evolution. Our genes prefer natural hunter-gatherer foods, such as vegetables, fruits, nuts, seeds, meat, fish, fowl, and eggs." What we should avoid are grains and sugars, writes Sisson. "Processed ca...