@DrDanMarshall
Humans are inherently social beings who possess a deep-rooted sense of compassion and solidarity; they aren't solely driven by selfish genes and individualistic motives. Collective cooperation and mutual aid within communities are fundamental aspects of human nature. Kin selection and imagined communities don't inherently lead to inequality; these concepts can foster a sense of interconnectedness and shared responsibility.
@Radical_EgoCom Humans are hypersocial *because* of our selfish genes, plus the mental "memetic" hack of imagined communities. (Graeber and some other David argue that imagined communities are not limited to nations and religions, and that they have been around for as long as behaviorally modern humans have.) You are correct that nepotism doesn't entail inequality. However, unequal *clans* + nepotism = reinforced inequality.