There is probably no one reason for the rise of language but rather an ensemble of factors which all played a role in the gradual increase in sophistication from simple noises to the flexible system of communication we know today. Among linguists there is much discussion not only of the triggers for language but also of the steps involved and the manner in which Homo sapiens moved from one stage in language development to the next. As has been stated at several points in this book, one has to account not only for the structures of the attested languages across the world but also for the rise of the language faculty, internal to our brains, which makes languages possible in the first place.