Every two weeks the world loses another indigenous language. Evolving over hundreds or even thousands of years, distinct languages are highly complex and extremely adaptable, but they are also more fragile and endangered than we might expect. Of the approximately 5,000 languages spoken around the globe today, Andrew Dalby predicts that half will be lost during this century. How will this linguistic extinction affect our lives? Is there a possibility that humanity will become a monolingual species? Should we care?

Language in Danger is an unsettling historical investigation into the disappearance of languages and the consequences that future generations may face. Whether describing the effects of Latin's displacement of native languages in the aftermath of Rome's imperial expansion or the aggressive extermination of hundreds of indigenous North American languages through a brutal policy of forcing Native Americans to learn English, Dalby reveals that linguistic extinction has traditionally occurred as a result of economic inequality, political oppression, and even genocide. Bringing this historical perspective to bear on the uncertain fate of hundreds of pocket cultures-cultures whose languages are endangered by less obvious threats, such as multinational economic forces, immigration, nationalism, and global telecommunications—Language in Danger speaks out against the progressive silencing of our world's irreplaceable voices.

More than an uncompromising account of the decline of linguistic diversity, Language in Danger explains why humanity must protect its many unique voices. Since all languages represent different ways of perceiving, mapping, and classifying the world, they act as repositories for cultural traditions and localized knowledge. The growing trend toward linguistic standardization—for example, politically designated national languages—threatens the existence of more marginalized cultures and ethnic customs, leaving only a few dominant tongues. The resulting languages become less flexible, nuanced, and inventive as they grow increasingly homogenized. Dalby argues that humanity needs linguistic variety not only to communicate, but to sustain and enhance our understanding of the world. People do not simply invent words out of thin air: our creativity and intelligence are, to a significant degree, dependent on other languages and alternate ways of interpreting the world. When languages intermix, they borrow and feed off each other, and this convergence catalyzes the human imagination, making us more intelligent and adaptable beings.