  Buttressing these concerns, critics have also called attention to other potentially troubling assumptions in the theoretical framework of liberal eugenics that undermine claims about the differences with the old eugenics. Bennett (2008), for instance, contends that an appeal to impersonal or non-person-affecting harm cannot get supporters of liberal eugenics out of the non-identity problem without resorting to troubling social justifications. Insofar as the liberal eugenic project is not interested in the welfare of particular people but in producing what liberal eugenicists believe is the best world possible, it is difficult to see the differences with the old eugenics which aimed at promoting social and not personal goods.