So Hodj in simple terms what your saying is there are no races, only the Human race with minor variations due to local effects and DNA's plasticity? If so that makes sense to me.
Edit: Guess I should have moved on to the next page where you explicitly showed pictures from the book that says basically that. Ugh.
When we're looking at it from a materialist and biological standpoint, yes, pretty much exactly that.
As a sociological and cultural phenomena, race certainly exists as a powerful myth. In that way its comparable to religious beliefs in some ways, and in fact, the concept of races began in part as an offshoot of European religious beliefs, which was another part of my paper on the subject of race, and that others have tackled directly as well. In this book
Anthropology of Race: Genes, Biology, and Culture (School for Advanced Research Advanced Seminar Series): John Hartigan, Ron Eglash, Clarence C. Gravlee, Linda M. Hunt, Christopher W. Kuzawa, Jeffrey C. Long, Pamela L. Sankar, Sandra Soo-Jin Lee, Zaneta M. Thayer, Nicole Truesdell: 9781934691991: Amazon.com: Books
There's a really good chapter titled "Racial Concepts in Genetics Research" that gives a very in depth overview of how certain Christian views of the origins of the world continue to perpetuate themselves, even in research paradigms in genetics (Mitochondrial Eve and Y-Chromosome Adam are two quick and handy examples of how even the imagery of these myths continue to influence genetics research in the modern age) that really digs into the mythological foundations of race concepts in European/Western culture.
Of course, Europeans have exported the concept, and these sorts of taxonomic mythologies have perpetuated globally now. The Rwandan Genocide between Hutus and Tutsis is an example of how folk taxonomies (to use the term found in Fish's book) catch on and are then used to justify conflicts and such elsewhere around the globe. The Tutsis, according to one theory, are supposedly migrants to the region from the Horn of Africa. This theory is promoted mostly by people who believe in the Hamitic theory (literally from the Biblical Ham, son of Noah who saw his nakedness and was cursed) and therefore believe that the Tutsis are foreigners in Rwanda, thus "justifying" their extermination during the Civil War in that nation. Hamitic theory basically says that "Black Europeans" migrated into the interior of Africa, conquered the peoples found there, and introduced civilization.
Genetic evidence seems to indicate the Tutsis are 3 times more related genetically to populations in the Nilo-Saharan region than the Hutus, which are known to be descendents of the Bantu agriculturalists in the region! Further, the Tutsis are demonstrated to have little to no direct relation to North Eastern Africa in the paternal lineage. Ultimately, gene flow between the two populations over time means that they're genetically related quite strongly, regardless their origins. Genetically speaking, they both share very strong linkages with other local Bantu populations.
While conflict between these two groups probably has roots in the pre Colonial era, the Hamitic theory of the European colonizers was used to justify divisions between Hutu and Tutsi along economic and racial lines, which led to further entrenchment of that conflict, as the Hutus, if I remember correctly, were subjugated during this time to the Tutsis. So once the European colonizers picked up and left (If I remember correctly they were German), these social divisions flared, and that's pretty much how you got the Rwandan genocide.
Oh I just remembered, another really good, very recent, book on Race Mythology is Robert Wald Sussman's "The Myth of Race" which also includes a very in depth break down of the European Christian origins of most race mythology.
That's probably the most accessible title to the layman on the subject
The Myth of Race: The Troubling Persistence of an Unscientific Idea: Robert Wald Sussman: 9780674417311: Amazon.com: Books