Poor AB. S/he must be understanding when O's and A's and B's are described and addressed and explained at length, with the tag "and AB is A plus B, and even has such-and-such pattern in common with O", etc.

We don't really understand AB yet: There's the crux of it. We can see the anthropologic progression from Pale-O-lithic to "A"gricultural neolithic to B's pastoral nomadism; this necessitates the kind of sweeping perspective to see history in 10.000-or-so year eras. AB, on the other hand, only appeared on the human scene - in relatively small numbers - approximately 1000 years ago, and we don't really know yet how our native 10+ millenia epoch will play out.

Of O's we know: They hunted and gathered and sweated.

Of A's we know: They settled and planted and civilized.

Of B's we know: They traveled and pastured and milked.

The A and B mutations manifested massive cultural pattern-shifts. As for AB, the blood group is unique in not representing a mutation, but rather a blending of A and B types (both genetically dominant), springing from the westward migration and A-cohabitation of B-bearing Asians.

Is it possible for us, so early in this as-yet-unnamed modern era, to speculate as to AB's cultural influence? What is the significance of A combined with B, of civilization combined with perpheral unrootedness?

One of the ways we can characterize the earlier three blood groups is vis-a-vis the animal kingdom:

O killed and ate them, often with animal assistants, sometimes with reverence.

A harnessed them to plows and carts, and, like O, set them against one another to human (in this case agricultural) advantage.

B led them to remote pasturages and used their every product (wool, milk, hide, meat, urine, dung) to sustain themselves along the way.

What is AB's relationship to animals? I daresay history will define the new connection. Meanwhile, most of us do not hunt and forage for our food. Nor do modern farms depend upon animal labor, instead favoring engines for farming, and chemicals and barriers for dealing with various vermin. And with the automobile and cell phones, pastoral nomadism has, as of the late 20th century, become obsolete.

Am I deducing that the AB epoch is that of the new non-relationship of humans and animals for obtaining food? All I can be sure of is that it is one of globalism, of East-meets-West, of intermarrying and global cross-racialization, far surpassing any preceding age's patterns. AB might also be poised to survive some future plague that shall decimate either A or B populations, thus substantially, and rather suddenly, increasing AB's representation. It'll be many centuries before humans will have the perspective to see The Pattern.

In any case, what do you AB's think?