What is diversity? Its message is beguilingly simple and effective. Humans come in a variety of formats—with differing genders, skin tones, hair color and types, eye shapes, and sizes in the realm of physical differences, and diverse languages, religions, nationalities, and lifestyles in the realm of social differences. While diversity acknowledges the unique identity of such peoples, it also stresses that despite differences, we are all the same—that is, we are all humans with equal rights and privileges. No one group is better or superior to another. Disability would seem naturally to fall under the rubric of diversity. Yet much of the time, when one sees lists of those included under the diversity banner, disability is either left off or comes along as the caboose on the diversity train. One could explain this negligence by saying that disability is just not that well known as an identity category; and that, when it is, disability will then take its rightful place along with more familiar identity markers such as race, gender, nationality, ethnicity, sexual orientation, and citizenship. One could say it will just take time and more activism and eventually people will be educated. Or one could say the problem is...