@Aristippus
“Why was it that the Indo-European languages spread so dominantly across parts of Eurasia, especially Europe?”
I won’t quibble with any of your conclusions, directly. And I love the question on one level. First however let’s acknowledge that the sheer complexity of the overlapping and related systems and phenomena involved would make it almost impossible to figure out any kind of definitive answer. My point here is to draw out an approach to drawing conclusions that we can be confident of, without drawing conclusions that we can’t be sure of.
To explain myself I’d refer to meteorology and weather prediction. Our “sophisticated” models of weather systems show us that we can predict with reliability over only a very, very small range of time. However, that doesn’t mean that we can’t draw logical conclusions and know that they are true.
When we know for example that a conclusion is true, but we see a different phenomena than we expect, that doesn’t mean our logic is wrong, it means that we’re missing other information in the system that drives behaviors we don’t understand, or understand but didn’t know about.
My example is prices and supply and demand. If we know that a new mine opens that is producing copper, it adds to the supply of copper in the economy. Therefore the price of copper will drop. However, if we see the price of copper rise, it doesn’t mean that we were mistaken about the law of supply and demand. It means that there was another unaccounted for drop in supply, or an unaccounted for rise in demand, or something happened on the money supply side. But it doesn’t invalidate the law of supply and demand, or the fact that our new mine pushed copper prices up. It means that push up wasn’t sufficient to override other factors pushing the price down.
This applies to all of science. Another point we can take from meteorology is that while we cannot know with certainty the exact form of the hurricanes that come in late summer and fall, we do in fact understand the phenomena (high water temperatures in the open ocean) that drive their formation. So we can understand how changes in water termperature will affect the quantity and the size and intensity of the hurricanes which do happen. We will understand the conditions that lead to their appearance, we will be able to plan for them, without knowing exactly when they will appear.
So in the realm of economics and politics, we can take the same tack with using logic in analyzing the systems. Here gets to my point. My points about an a priori definition of conflict, mean that IF the conditions I described exist conflict MUST occur. I’m as accurate in that logical construction as Euclid’s geometry was in it’s logic. The only question about either logical system is “Does it match the conditions of reality?”
I believe we can make logical arguments that say the concept of property MUST arise. I believe it’s sound to also state that the nature of the boundaries established around the concepts of property (time constraints, shared ownership, hierarchy of claims, etc.) under a social group’s norms will have a direct and logically derived impact on the structure and technology of the social group. Even moreso, if we find that our logical conclusions don’t match exactly what we observe on the ground, it doesn’t mean what we said wasn’t logical or that it doesn’t apply. Like with prices above it means that we are missing some other phenomena that counteracts the effect we believe we should be seeing.
So in modern democracies, we assume (and rightly so, IMO) that the crippling burden of taxation is being overcome by the massive improvements to production by technological innovation. In the example above, I believe the number of phenomena from the different systems involved that contribute to the effect of Indo-european languages dominating will come from both the language itself, and from the social structures of the different competing groups, and the features of the languages that fell away, and from the environment itself.
For example, I think a necessarily obvious change in norms is necessary to move from a hunter/gatherer society to an agriculture society. Namely, one must come up with at minimum the idea of exclusive use of land and the agricultural products by a specific social group (tribe, family, clan, village, etc). And that due to differing norms, there will be some need to defend that claim from other groups with different norms. In hunter/gatherer groups, I’m think it’s logical to assume that the scarcity issue would come up with co-located groups, and that this would also form a pressure for establishing boundary claims about land and the products of that land (animals and plants).
So, while I think the language itself will have a big impact on some aspects of this, I think it’s also obvious that the groups who didn’t form these concepts, couldn’t win the competition for scarce resources. Efficiency in communication might also play a role. In communication you have two competing phenomena, fidelity (lack of noise or confusion in the transmitted message) and brevity (speed of transmission). So, for sheer time and clarity purposes “My car” is faster and clearer than “Car of David”.
Lots of factors at play here, and I think it’s a fun topic and lots of conclusions can be made about differnt phenomena that would play a role in the results that we see. But I’d be careful looking for “the reason”. I don’t think that’s an achievable goal. And I hope to make it clear that this is a generic point to be made about all of science and technology (social and physical). These are complex systems, and lots of parts play a role.