An increasing amount of very diverse scholarship self-identifies as belonging to the field of neuroethics, illuminating a need to provide some reference points for what that field actually entails. We argue that neuroethics is a single field with distinct perspectives, roles, and subspecialties. We propose that—in addition to the three traditional perspectives delineated by Eric Racine—a fourth, socio-political perspective, must be recognized in neuroethics. The socio-political perspective in neuroethics focuses on the interplay between the behavioral as well as the brain (...) sciences and the socio-political system; this interplay includes social regulation in addition to all other realistic elements of social and political neurodiscourses. Thus, defining what—if any—roles the socio-political perspective in neuroethics might have is a pressing issue. Doing so could provide guidance for defining the criteria for prospective ethical evaluations in neuroethics. A promising approach to doing this could be by describing the roles of neuroethics in terms of the more concrete examples of the roles of political philosophy in general, as in the tradition of John Rawls. We take klotho, the supposed “longevity protein,” as a modern neuroethics case to exemplify the obstacles faced in securing neuroethics’ legitimacy and how the Rawlsian framework we propose may be applied to handle cases such as this. Ultimately, the socio-political perspective in neuroethics should not be swayed by the media hype and ought to offer useful ethical guidance and articulation of genuine ethical concerns to policy makers and the public alike. (shrink)