Bomhard (2008) suggests a differentiation of Proto-Nostratic by 8,000 BCE, the beginning of the Neolithic Revolution in the Levant, over a territory spanning the entire Fertile Crescent and beyond into the Caucasus (Proto-Kartvelian), Egypt and along the Red Sea to the Horn of Africa (Proto-Afroasiatic), the Iranian Plateau (Proto-Elamo-Dravidian) and into Central Asia (Proto-Eurasiatic, to be further subdivided by 5,000 BCE into Proto-Indo-European, Proto-Uralic and Proto-Altaic).
