What's Left of Moral Bioenhancement? Reviewing a 15-Year Debate

Should we implement biomedical interventions like psychopharmaceuticals or brain stimulation that aim to improve morality in society? Since 2008, moral bioenhancement (MBE) has received considerable attention in bioethics, generating wide scholarly disagreement. However, reviews on the subject are few and either outdated or not structured in method. This paper addresses this gap by providing a scoping review of the last 15 years of debate on MBE (from 2008 to 2022). To enhance clarity, we map the debate into three key areas: the conceptual foundations of MBE (foundational questions), the practical feasibility of MBE (practical questions), and the normative legitimacy of MBE (normative questions). Beyond identifying specific research gaps within these domains, our analysis reveals a general lack of empirical evidence either supporting or opposing MBE, as well as a shift in the literature from a universal interpretation of MBE to a more pragmatic one, targeting specific groups.