 For example, under this view, the case of the evolution of altruism, which is commonly attributed to group selection, should not be considered as such, because of the lack of a true reproducer at the group level; the group level description depicts at best a marginal Darwinian population (Godfrey-Smith 2009: 119). Rather, the argument is that a neighborhood selection model, in which individuals are affected by the phenotypes of their neighbors but cannot be seen as “collectives competing at a higher level,” is fully capable of capturing the selective process involved, and represents a Darwinian population, in which the individuals are seen both as the interactors and the reproducers (2009: 118). This would seem to entail that many group selection accounts (e.g., Sober &amp; Wilson 1998), as well as any models classified as Multi-level selection 1 (MLS1) models (Heisler &amp; Damuth 1987), cannot be properly considered as such. This view grants that there are empirical examples in which a group-level reproducer clearly exists (for example, Wade &amp; Griesemer 1998; Griesemer &amp; Wade 2000; there is otherwise no discussion of Wrightian approaches to group selection). The approach using Darwinian populations and reproducers is claimed to present an advantage over other available analyses of units of selection because it can account for previously neglected examples such as epigenetic inheritance systems (Godfrey-Smith 2009). The question remains as to whether gaining an account to deal with these is worth rejecting an entire class of accepted group selection models, and whether such a loss is truly necessary to deal with epigenesis, given that we have an epigenetic account with reproducers that allows for group selection (see Griesemer 2000c).