  Most advocates of liberal eugenics, however, dismiss worries about effects on human nature. They contend that we have likely unjustifiable intuitions that our present nature is worth preserving (Buchanan 2011) or they argue that a main trait of human nature is its changeability (Harris 2007). Other advocates claim that we have a tendency to overvalue the “status quo” and this leads us to see some core values, e.g. openness to the unbidden, current longevity parameters, etc., as optimal when in fact we are simply affected by status quo bias (Green 2007; Bostrom and Ord 2006).