Language is a natural resource: Power and vulnerability are associated with access to language, just as to food and water. In this new book, a linguist and philosopher elucidate why language is so powerful, illuminate its very real social and political implications, and make the case for linguistic equality—equality among languages and equality in access to/knowledge of language and its use—as a human right and tool to prevent violence and oppression. Students and instructors will find this accessible, interdisciplinary text invaluable for courses that explore how language reflects power structures in linguistics, philosophy/ethics, and cognitive science/psychology.