Food for thought from chapter 2 of March of the Titans: The Complete History of the White Race:
These three groups: Proto-Nordics, original Mediterraneans, and Alpines, settled large parts of Europe and the Middle East, a situation which remained stable until the entire continent was subject to invasions by Nordic tribes—called the Indo-European peoples, which started around 5000 BC.
The Indo-Europeans, the original European groups, and the Alpines, together form the basis of the white race which today inhabits Europe. These three white subgroups eventually combined to dominate territory which stretched from Britain to the Ural Mountains: from Scandinavia to North Africa and the Middle East.