Trends in Linguistics is a series of books that publishes state-of-the-art work on core areas of linguistics across theoretical frameworks as well as studies that provide new insights by building bridges to neighboring fields such as neuroscience and cognitive science. The series considers itself a forum for cutting-edge research based on solid empirical data on language in its various manifestations, including sign languages. It regards linguistic variation in its synchronic and diachronic dimensions as well as in its social contexts as important sources of insight for a better understanding of the design of linguistic systems and the ecology and evolution of language. Bonfiglio examines the ideological legacy of the metaphors "mother tongue" and "native speaker" by historicizing their linguistic development. The early nation states constructed the ideology of ethnolinguistic nationalism, a composite of language, identity, geography, and ethnicity that configured the national language as originating in the mother-infant relationship, as well as in local organic nature. These insular protectionist strategies generated the philologies of (early) modernity and their genetic and arboreal "families" of languages, and continue today to evoke folkloric notions that configure language ethnically. Scholarly recognition of the biological metaphors that racialize language will help to illuminate persisting gestures of ethnolinguistic discrimination.