Probably the most common rejoinder to the problem of prevention is to distinguish the problems to which they respond. Treatments are interventions that address the health problems created by diagnosable diseases and disabilities—“maladies” in the helpful language of Gert, Culver and Clouser (2006). Enhancements, on the other hand, are interventions aimed at healthy systems and traits. Thus, prescribing biosynthetic growth hormone to rectify a diagnosable growth hormone deficiency is legitimate t