In this book, the author argues that the language spoken in Serbia, Croatia, Bosnia and Herzegovina, and Montenegro is a pluricentric language with four variants. These variants do differ slightly, as is the case with other pluricentric languages (English, Spanish, German and Portuguese, among others), but not to a degree which would justify considering them as different languages. The book is also a critique of linguistic nationalism and of its main features: the celebration of purism, the obsession with etymologies, the equation of nation with language, and the falsification of history.