Afro-Asiatic languages originated in eastern Africa. They then spread to north Africa and out to western Asia. Maybe AA eventually reached the Caucasus and eastern Europe, and then perhaps proto Indo-European started to diverge from it?Etain said:Interesting theory. It's possible there's a connection but the afro-asiatic languages originated far away from where indo-european did. I can't think of a migration route that would make sense. Indo-European likely originated in modern day Ukraine.
Indo European, Turkic and Uralic languages didn't come out of thin air. They all probably some how diverged from Afro-Asiatic, or at least share a "common ancestor" with AA.