Good addition  but it must be counterbalanced by the fact that Cavalli-Sforza's findings are contested.  These are word games.  First, "Caucasoid" is not synonymous with "Caucasian," which means "white"  a point seemingly lost on some of the contributors to the article.  Indigenous, sometimes blue-black black Africans of North Africa, including Nubia, Somalia, Sudan and Abysinnia (the Oromo of Ethiopia and Eritrea), have been classified as "Caucasoid" because of certain craniofacial characteristics  notably longer, more slender faces, thinner lips and the absence of alveolar prognathism; and because of, in some cases, finer, straighter hair than is the norm for so-called "Negroid", or sub-Saharan, populations.  Such characteristics  except, to my knowledge, those related to hair texture, are the result of naturally biodiversity among African peoples and can be found in populations in sub-Saharan Africa, as well.  It is these populations who are thought by some scholars to have been the founders of the ancient Indian civilizations of Harappa, Mohenjo-Daro and others. 

 The name "Caucasoid" when applied to these peoples refers to the fact that it is surmised that the ancestors of some of these North African populations  indigenous blacks of the continent  migrated out of Egypt, through the Middle East and the Levant and eventually mutated over time into populations now termed "Caucasians," or whites.  Some scholars have opted for the term "proto-Caucasoids" to describe these "seed" black populations.  Others, like Blumenbach, have referred to them as the "brown race" or "Mediterranean race."  These are the peoples responsible, in part, for the still very noticeable "Negroid" strain in the Middle East, in nations like Iran, Iraq and Saudi Arabia. Other scholars  Afrocentrists  have chosen another word, one that encompasses the full range of phenotypes of black, African peoples:  Africoid, arguing that a word which contains a geographic referrent to Europe is wholly inappropriate when describing indigenous African peoples and is at odds with the longstanding tradition of naming peoples after their geographic points of origin (e.g. Mongoloids and Caucasoids in the case of white people).