The Search for an Astrological Signature of Blood Types
Chemical analysis of the Type O blood group reveals that from a structural perspective, it is the simplest blood group and it serves as the backbone or foundation for the synthesis of increasingly complex A, B and AB. These later blood groups evolved by adding other sugars onto the basic O sugar, much like a family tree.
The Neolithic Period was important in the distribution of the ABO blood groups. This new, relatively sedentary, agrarian lifestyle and the major change in diet resulted in a new mutation in the digestive tracts and immune systems of these early people. Many of them became carriers of group A blood. The blood group A variant allowed humans to tolerate and better assimilate grains and other agricultural products. Blood group A initially appeared in any significant numbers in the early Caucasian peoples, sometime between 25,000 and 15,000 B.C., in the Middle East or in western Asia. The gene for group A was carried into western Europe and Asia during the movement of these Neolithic societies, especially a branch termed the Indo-Europeans, where it penetrated extensively into the pre-Neolithic Type O populations
The gene for blood group B first appeared in significant numbers somewhere around 10 to 15,000 B.C., the tail end of the Neolithic period, in the area of the Himalayan highlands now part of present day Pakistan and India. Like the environmental conditions which spawned the advent of group A, the development of blood group B was in large part a response to changes in the environment. But unlike A, which began to supplant group O as a response to new types of infections, then thrived as a result of the new dietary changes, group B appears to have been more of a response to climatic changes, followed by a different set of dietary adaptations. Life in the tropical flat savannas of eastern Africa gave way to a harsher existence as the Cro-Magnon hunters migrated to the colder, drier, mountainous areas of the subcontinent and the barren endless plains of the central Asian steppes.
It is possible that blood group B may have been the only blood group with the capabilities to survive in such a harsh environment. The evidence that supports this theory is the levels of certain hormones including testosterone and estradiol in mountaineers of those living at higher elevations. At high altitudes blood O group had had lower concentrations of estradiol and testosterone, blood group B, the highest.
To modern day anthropologists, blood group B continues to this day to be an "Eastern" blood group. It is found in high numbers among Asians such as the Chinese, Indians, and Siberians. In Europe, blood group B is more frequently found in Hungarians, Russians, Poles, and other eastern Europeans. It is not found in large numbers among western Europeans. Among pre-Neolithic people, such as the Basques and Amerindians, group B is practically nonexistent.
Blood group AB is found in less than five percent of the population. It is certainly the most recent blood group. Unlike the other Abo blood groups, group AB resulted from the intermingling of group A Caucasian people and group B Mongolian people. Some of this may have been peaceful, some must have been part of the violent turmoil that marked the great "Migration of Peoples" at the end of the Ancient Period (300AD-800AD).
ABs seem to have the greatest advantage because these people inherit the tolerance of both A and B. Perhaps this serves to enhance the AB immune system's abilities to manufacture more specific antibodies to microbial invaders, as it possess neither anti-A or anti-B antibodies.