Philosopher Michael Sandel argues in his new book, "The Case Against Perfection," that peoples' drive to better themselves or their children through genetic engineering violates deep-seated human norms as they seek to create a perfect person. The reviewer, William Saletan, points out, "We might create a world of perfect SATs, E.R.A.’s and C.E.O.’s. But it would never be a perfect world, because the point of perfection is that its definition doesn’t bend to our will."