Proto-world language

The Proto-Human language (also Proto-Sapiens, Proto-World) is the speculative most recent common ancestor of all, or at least the large majority of, the world's languages.

The concept of "Proto-Human" presupposes monogenesis (evolution from a common ancestor) of all natural languages apart from pidgins, creoles, and sign languages. It does not presuppose a common ancestor of these languages with all extinct lineages, whether human or possible Neanderthal languages.

There is no generally accepted term for this concept. Most treatments of the subject do not include a name for the language under consideration (e.g. Bengtson and Ruhlen 1994). The terms Proto-World and Proto-Human are in occasional use. Merritt Ruhlen has been using the term Proto-Sapiens.

The first serious scientific attempt to establish the reality of monogenesis was that of Alfredo Trombetti, in his book L'unità d'origine del linguaggio, published in 1905 (cf. Ruhlen 1994:263). Trombetti estimated that the common ancestor of existing languages had been spoken between 100,000 and 200,000 years ago (1922:315).

Monogenesis was dismissed by many linguists in the late 19th and early 20th centuries, when the doctrine of the polygenesis of the human races and their languages was widely popular (e.g. Saussure 1986/1916:190).

The best-known supporter of monogenesis in America in the mid-20th century was Morris Swadesh (cf. Ruhlen 1994:215). He pioneered two important methods for investigating deep relationships between languages, lexicostatistics and .

In the second half of the 20th century, Joseph Greenberg produced a series of large-scale classifications of the world's languages. These were and are controversial but widely discussed. Although Greenberg did not produce an explicit argument for monogenesis, all of his classification work was geared toward this end. As he stated (1987:337): "The ultimate goal is a comprehensive classification of what is very likely a single language family."

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