Abstract

In Pregnancy and superior moral status: A proposal for two thresholds of personhood, Robinson argues that pregnant women are unique beings with superior moral status (MS) to that of other adult human beings. Robinson’s defence of this view relies on metaphysical and moral claims. The first set of claims concerns the ontological status of the pregnant woman, whom she considers a ‘unique organism’,‘more than just one person’and ‘numerically increased’.1 The second set of claims concerns the ‘superior’ MS of the pregnant woman. In this commentary, we address this second set of claims and argue that Robinson’s view rests on a misunderstanding of the concept of MS and its role in supplying reasons for action (and forbearance from action). While we welcome the conclusion of Robinson’s argument—which we take to be that pregnant women ought to be treated with more consideration—on an appropriate understanding of MS, her argument does not yield that conclusion at all. We feel strongly that medical ethics needs to be grounded in good philosophy and worry that too much of the literature falls short of this ideal. As such, the spirit in which we write this commentary is that of constructive criticism. ### One plus one equals one plus one and the grounds of MS The philosophical literature on the grounds of MS essentially addresses the question of what properties (Ps) determine whether an agent (A) has MS.1 Examples of Ps are: sophisticated cognitive capacities,2 such as the capacity to value, being self-aware or rational, or more controversially, …