outlined in a 2004 article by Jerold Abrams is the elimination of differences in favor of universality. This, he argues, will eliminate the ability of individuals to subvert the possibly oppressive, dominant structure of society by way of uniquely expressing themselves externally. Such control over a population would have dangerous implications of tyranny. Yet another consequence of enhancing the human form not only cognitively, but physically, will be the reinforcement of "desirable" traits which are perpetuated by the dominant social structure. Physical traits which are seen as "ugly" or "undesirable" and thus deemed less-than, will be summarily cut out by those who can afford to do it, while those who cannot will be forced into a relative caste of undesirable people. Even if these physical "improvements" are made completely universal, they will indeed eliminate what makes each individual uniquely human in their own way. Specter of coercive eugenicism Some critics of transhumanism see the old eugenics, social Darwinist, and master race ideologies and programs of the past as warnings of what the promotion of eugenic enhancement technologies might unintentionally encourage. Some fear future "eugenics wars" as the worst-case scenario: the return of coercive state-sponsored genetic discrimination and human rights violations such as compulsory sterilization of persons with genetic defects, the killing of the institutionalized and, specifically, segregation and genocide of races perceived as inferior. Health law professor George Annas and technology law professor Lori Andrews are prominent advocates of the position that the use of these technologies could lead to such human-posthuman caste warfare. The major transhumanist organizations strongly condemn the coercion involved in such policies and reject the racist and classist assumptions on which they were based, along with the pseudoscientific notions that eugenic improvements could be accomplished in a practically meaningful time frame through selective human breeding. Instead, most transhumanist thinkers advocate a "new eugenics", a form of egalitarian liberal eugenics. In their 2000 book From Chance to Choice: Genetics and Justice, non-transhumanist bioethicists Allen Buchanan, Dan Brock, Norman Daniels and Daniel Wikler have argued that liberal societies have an obligation to encourage as wide an adoption of eugenic enhancement technologies as possible (so long as such policies do not infringe on individuals' reproductive rights or exert undue pressures on prospective parents to use these technologies) to maximize public health and minimize the inequalities that may result from both natural genetic endowments and unequal access to genetic enhancements.