A couple of things I'll point out. Evolution occurs at the level of population genetics, and it's not concerned with finding a stable state for any characteristic, at least not directly.

But more importantly to your question, the way we define society right now, or agree to be governed, is not a given, and it's not a fundamental quality of the universe or its reality.

Society in this point in time is an artifact of this point in time, and the accumulation of our historical and cultural works. So what is the societal problem, and for whom? How is the meaning of such a problem transferred from a social phenomena (resource allocation) to a biological one (stress responses, like cortisol homeostasis) to one which affects populations (propagation of some phenotype or genes)?

You have to connect sentience and cognition in a direct line with biological stress responses and evolutionary genetics, and its effect on brain evolution. It's an interesting question, but it depends on how it is decomposed and framed.