 Perhaps the most tenacious source of resistance to the “mere difference” claim comes from a stubborn asymmetry, which appears to distinguish disability from race and sex and to challenge its neutrality. We generally seek to prevent individuals who are not disabled from becoming disabled, but not vice-versa. We strongly support measures to prevent disability, if prevention can be accomplished without coercion, harmful side effects, or the loss or disruption of personal or narrative identity. Consider a form of prevention widely seen as unproblematic: taking folic acid during pregnancy to prevent spina bifida. Some governments mandate that certain food be enriched with folic acid. These mandates are controversial, but the controversy concerns the issues of involuntary medication and possible side-effects rather than the intended preventative effect. Few, if any, disability advocates object to these mandates, any more than they object to the myriad safety measures imposed by the modern state, from requiring seat belts to restricting teratogenic drugs. Many object to the needlessly grim depiction of disability in some safety campaigns; few to the campaigns themselves (Emens 2012).