この地球には一体いくつの言語が存在すると思いますか。ある言語とその他はどのように識別されるのでしょうか。多くの言語が消滅していますが、新しい言語も一方で誕生しているのでしょうか。…本書はこうした言語に関する疑問に向き合います。言語学の世界に足を踏み入れてみると、実はこれらの答えは想像するほど単純ではないことがわかるでしょう。(cf. Linguistics, #093)
    

• Provides the basic facts about the world's major families of spoken languages and their distribution around the globe
• Relates to some of the big social issues facing the world today, such as bio-diversity and the endangerment of species and cultures
• Looks at the reasons behind why languages are declining, and why this really matters
• Raises the question about how we identify a language, and considers how we differentiate a 'language' from a 'dialect'
• Looks at signed languages and considers the similarities and differences to spoken language

 
How many languages are there? What differentiates one language from another? Are new languages still being discovered? Why are so many languages disappearing? 

The diversity of languages today is varied, but it is steadily declining. In this Very Short Introduction, Stephen Anderson answers the above questions by looking at the science behind languages. Considering a wide range of different languages and linguistic examples, he demonstrates how languages are not uniformly distributed around the world; just as some places are more diverse than others in terms of plants and animal species, the same goes for the distribution of languages. 

Exploring the basis for linguistic classification and raising questions about how we identify a language, as well as considering signed languages as well as spoken, Anderson examines the wider social issues of losing languages, and their impact in terms of the endangerment of cultures and peoples.