Hamraie reveals that the twentieth-century shift from “design for the average” to “design for all” took place through liberal political, economic, and scientific structures concerned with defining the disabled user and designing in its name. Tracing the co-evolution of accessible design for disabled veterans, a radical disability maker movement, disability rights law, and strategies for diversifying the architecture profession, Hamraie shows that Universal Design was not just an approach to creating new products or spaces, but also a sustained, understated activist movement challenging dominant understandings of disability in architecture, medicine, and society. Illustrated with a wealth of rare archival materials, brings together scientific, social, and political histories in what is not only the pioneering critical account of Universal Design but also a deep engagement with the politics of knowing, making, and belonging in twentieth-century United States.