Carleton S. Coon's racial theory. http://en.wikipedia.org/wiki/Carleton_S._Coon
The 20th century racial classification by American anthropologist Carleton S. Coon, divided humanity into five races:
Before the Pleistocene
After the Pleistocene
In his landmark book The Races of Europe, Coon defined the Caucasian Race as encompassing the regions of Europe, Central Asia, South Asia, the Middle East, North Africa, and Northeast Africa.