I was first responding to the claim that:
"The original human blood type was O (originating in Africa),
then came A with the development of agriculture (originating in
the Middle East, between 25000 and 15000 BC, and spreading west
into Europe), then came B with the development of herding
(originating in the western Himalayas, and spreading east into
China and India, between 15000 and 10000 BC), then came AB with
the fusion of A and B types, resulting from the first Mongol
invasion of Europe by Attila the Hun.
These are well established facts in anthropology."
Is this claim accurate?
There are several indicators that it is not accurate.
1st: Many published studies over recent years have shown that chimpanzees mostly have Blood type A, almost no Blood type O, but never Blood type B. The other great ape, the gorilla has Blood type B, almost no Blood type O, but never Blood type A. In these 'man-apes' species, said to be the ancestors of man, there is NO Blood type AB in either. Generally speaking, man has both Blood types A and B, and Blood type AB. Blood type O, in man is by far the most common in virtually every racial group.
What does this tell us? Well, EITHER humans have sexually interacted with chimpanzees and gorillas in the last 25,000 years (unlikely, according to evolutionary theory), OR blood types A and B BOTH existed in the common ancestors of humans, gorillas and chimpanzees. Since evolutionary theory holds that the split between these species occured MORE than 25,000 years ago....then the statement I was responding to must be incorrect. That is, blood types A and B are ancient.
Url for source data here: [www.bloodbook.com]
2nd: The same site, different link states: "As an example, the early European races are characterized by a very low type B frequency, and a relatively high type A frequency while the Asiatic races are characterized by a high frequency of types A and B." And frome the same site: the Ainu people (the aboriginal people of Japan) have 32% type A, 32% B, 17% O, and 18% AB; from this link: [www.bloodbook.com]
What does this mean? Well...the Ainu clearly did not develop their AB blood type from "a mongol invasion". And the non-Japanese people (who apparently came from Korea) have blood types 38% A, 22%B, 30% O, and 10% AB. They may have gotten the AB from the Ainu who preceded them -- but the Ainu CLEARLY were in Japan a long time ago. Their AB development is not likely to be "recent" -- therefore the claim that AB is a recent development is unlikely.
In fact, looking at the chart, it would appear that the Ainu were the originators of the AB blood type, as the prevalence of that blood type drops off in proportion to geographical distance from their location.
3rd: The original statement said: "The original human blood type was O (originating in Africa)". But looking at the 2nd link, blood type O is is pretty scattered. Peruvian Indians are 100% type O, Bororos (Brazil) are 100%, Mayas 98%, Navahos (American Indian) are 73%, and Eskimos (Inuit) are 54% type O. It is true that some African tribes have a lot of O (Sudanese 62%), but Bantus only have 46% O.
Added to the fact that gorillas and chimpanzees have VERY LITTLE type O, it not proven that type O necessarily originated in Africa. It is highly likely that it occurred after humans split from the line that produced gorillas and chimpanzees, but not necessarily in Africa.
And this site: [www.lexiline.com] states: "Given the above facts, blood types AB and O seem to be a combination of A+A, A+B or B+B (AB as exclusive and O as inclusive) - whereas A and B themselves appear to be separate original groups. Only if the father and mother are "A AND B" or "B AND A" blood type can the child then be born with any of the human blood groups A, B, AB or O. This negates current theory that O is the original blood type, especially since the man-apes have little or no O blood type and no AB blood type at all. A and B are very likely the originals."
Bottom line - evidence that AB blood originated from "a mongol invasion" in relatively recent history is HIGHLY UNLIKELY! And that was my point.
(Note: to be fair, this site: [www.bellaonline.com]
makes the exact assertion of the original poster, but the evidence does not appear to back up the assertion. Ever more foolishly, this site: [www.everyforkintheroad.org] even claims that "...with one of the types (AB) coming into existence as recent as sometime in the the 1800s". Considering how widely spread the type is, and the prevalence in the Ainu, Japanese, Chinese-Peking, Hindus (Bombay), Gypsies (Hungary), Kalmuks, and Koreans -- it CLEARLY did not occur "sometime in the 1800's". Nope.