  Unlike traditional ideas of race and sex, disability has always been understood to be a permeable classification. Some people have lived at length or lifelong with disability, some are newly so, and others have lived through periods in which they were disabled but now are not so. A large number of us should expect to become disabled later in our lives. And many of us find ourselves intimately involved in the lives of family members or friends who now are disabled or who face a future of disability. Further, as Eva Kittay reminds us, social policies that pertain to disabled people also affect their family members, friends and professional caregivers (Kittay 1998; Kittay 2001). So feminist disability theory should recognize that disability affects the identities of many people beyond the 600 million worldwide who are themselves disabled (Herr, Gostin, and Kuh 2003).