Deaf people are usually regarded by the hearing world as having a lack, as missing a sense. Yet a definition of deaf people based on hearing loss obscures a wealth of ways in which societies have benefited from the significant contributions of deaf people. In this bold intervention into ongoing debates about disability and what it means to be human, experts from a variety of disciplines--neuroscience, linguistics, bioethics, history, cultural studies, education, public policy, art, and architecture--advance the concept of Deaf Gain and challenge assumptions about what is...