  Given the emphasis that liberal eugenics proponents place on reproductive freedom, another concern raised by critics is related to the possibility that the choices prospective parents will make will undermine some central core of human nature or of our normal human capacities. For some critics such as Kass (2003) and Sandel (2007), the human disposition of hubris or mastery that the project of genetic engineering expresses and promotes, undermines a central aspect of humanity: our appreciation of the gifted character of human life, the sense that the way we are is not solely the product of our own doing. Similarly, Habermas (2003) contends that in transforming reproduction from a natural process of creation to one of manufacture, genetic engineering practices will fundamentally alter relationships in the moral community as well as human freedom and autonomy.