This book provides an overview of the issues surrounding language loss. It brings together work by theoretical linguists, field linguists, and non-linguist members of minority communities to provide an integrated view of how language is lost, from sociological and economic as well as from linguistic perspectives. The contributions to the volume fall into four categories. The chapters by Dorian and Grenoble and Whaley provide an overview of language endangerment. Grinevald, England, Jacobs, and Nora and Richard Dauenhauer describe the situation confronting threatened languages from both a linguistic and sociological perspective. The understudied issue of what (beyond a linguistic system) can be lost as a language ceases to be spoken is addressed by Mithun, Hale, Jocks, and Woodbury. In the last section, Kapanga, Myers-Scotton, and Vakhtin consider the linguistic processes which underlie language attrition.