In this Essay, Professor Fitzgerald observes that the law and practice governing medical treatment decisions for seriously ill and disabled newborn children requires physicians and parents to compare such children with an unstated norm. She discerhs that our jurisprudence informs that unstated norm with an exclusive model of legal personhood, that of the autonomous individual, an independent and self-sufficient adult. Parents and physicians may conclude, then, that a seriously ill or disabled newborn child who cannot eventually become an autonomous adult should not receive life-saving or life-prolonging treatment. Professor Fitzgerald suggests that this treatment paradigm parallels a cultural resurgence of genetic determinism, influencing p...