Blind Guardian the 2nd
Our behaviour is enabled by our biology, not formed by it. It is instead shaped and formed through the very social nature that our biology enables. Of course, if this is what you said above, I am terribly sorry but I feel you overworded it.
You are dodging the question. I say that a form reductionism should be theoretically possible because to suggest otherwise is to posit a form of dualism. If human social interaction is not "emergent", arising from the interaction of multiple organisms interacting, then where does the "social" reside in the universe? You say that it human behaviour is not explained by evolutionary considerations, I am not saying that current biology explains behaviour, I'm saying that biology must eventually drive behaviour, only that multiple humans interacting makes the situation so complicated that we cannot use our understanding of biology at this point in time. The alternative is dualism and that is a metaphysical leap I am not prepared to make.
Again, to show the same problem within physics itself where emotional special pleading cannot be defended. Fundamental physics, the quantum field theories (QFTs) that are amazing successful in describing how subatomic particles interact, allow time reversal. If you look at thermodynamics then time reversal is forbidden, there is a distinct arrow of time, and the systems are so complicated that you must abandon the QFT approach and model thermodynamics systems according to how we observe them to operate. How do we resolve the allowing of time reversal in the fundamental theories with "higher" level physics forbidding it? This is known as
Loschmidt's paradox. What we have is a situation where we can describe what happens in the case of a few subatomic particles scattering off each other very well, but if we consider these subatomic particles as a very very large ensemble then we must "forget" what we understand about the individual objects. You cannot appeal to a glib "humans are special" argument when a similar situation occurs within a field like physics with "mindless" particles and atoms the objects causing the difficulty. We must "forget" what we know about the fundamental but the "higher" interactions are still driven and caused by the fundamental interactions.
Stop dodging the mind-body problem. Either the human mind can be found in the physical universe and must necessarily be a thrall to chemical and physical interactions within the brain, or it is not in the physical and we must explain where it is and what that means. And if the mind can be found in the physical then what is so special about social interaction apart from it being a very complicated problem of multiple humans interacting? Sure, we have to consider an aggregate model of interaction for pragmatic reasons but it is still driven by the more primitive interactions.