The essays on language have been inspired by the work of sociolinguists on the ways in which the same individual may use different languages or forms of language in different situations. The essays on cities are more diverse, including violence, noise and even smells, but most of them share two themes with the essays on language. The first and most obvious theme is communication, the second is identity, since language and clothes were and are a means to place unknown individuals in their social group._, Usado-NUEVO