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:
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.
An Australoid skull next to a caucasoid skull.
Human Capoid Skull
Capoid Skull common among the khoi-san bushman people that live in the southwest of Africa and a full different race from the negroids.
The Skulls of the three Major Races
Caucasoid // Mongoloid // Negroid