 The disability rights movement began with the idea that discrimination on the basis of disability was not different in any morally important way from discrimination based on race. The aim of the movement was to enshrine in law the same kind of antidiscrimination principle that protected persons based on their race. But some theorists have questioned how well the analogy holds. They point out that applying the antidiscrimination norm to disability, for example, by installing ramps for access to buildings or offering special education programs, requires taking account of physical or mental differences among people. This seems to be treatment based on a person’s physical or mental features, apparently the exact opposite of the ideal of “colorblindness” behind the traditional antidiscrimination principle.