Originally posted by Anonymouse
The reason why Italians for instance have darker complexion than Scandinavians has nothing to do with mixing with non-Europeans. The genetic core of all Italians are Greco-Roman and Etruscan. Physically, Greco-Romans and Etruscans tended to be predominantly dark haired and dark eyed brunettes, take a close look at their self-depictions upon ancient murals and paintings (especially Greek pottery).
Genetically, Greco-Romans, Etruscans and various Anatolian nations such as the Hittites, Sumerians and the Urartians were generally speaking Mediterranean/Alpine types (two of the four or five major sub-groups of the white race). The Mediterranean/Alpine type tends to be darker pigmented when compared to his/her Nordic brethren (another sub-group of the white race). According to biologists and geneticists, the differences in pigmentation and even certain physical composition of various European nations are due to climate factors and environmental stresses.
Blonde haired and blue eyed Nordics are only a sub-group within the greater Caucasian/white race. Thus, blondes do not set any standards for being Caucasian/white. However, it is unfortunate that since the early twentieth century the Nordic type has managed to high-jack the representation of Caucasian/white race. Incidentally, peoples of northern Europe have an admixture. This northern European admixture is Asiatic (Turanid, Bulgar, Hun, Mongol, Sami, ect.) and that is precisely why many northern Europeans have the high cheek bones, narrow eyes and lack of body hair.
Nevertheless, you are right that a north African admixture did enter the Italian peninsula. However, this occurred more-or-less during the classical period and in relatively small numbers. Modern genetic surveys reveal around five to ten percent north African admixture within Southern Europe and the Britannic Isles. However, there is five to twenty-five percent Asiatic admixture within northern and eastern Europe. I may be wrong, but I think we Armenians do not have any significant African and/or Asiatic admixture within our nation. However, we do have a bit of Mesopotamian admixture - by way of Assyrians I presume.
In final thought, northern European Caucasians look lighter than southern European Caucasians not only because of climatic and environmental stresses, as I previously mentioned, but also because their "Asiatic" admixture which also tended to be light skinned Asian. Please, realize that there are no "pure" nations, especially within Eurasia. There are nations, however, that have a relatively less admixture than others. The least mixed peoples on earth only exist within the remotest areas of Africa, south America and south eastern Asia.
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