Write on connections between folk morality apparent coherence relying on low power for value change amongst other things, being hard to kill or create people, (population ethics) common incentives re situationism, e.g. shared conceptual schemes that are easy to track (human animal iff person etc.), Maybe widespread belief in moral realism/moral authorities too. Relation of this to goodhart’s law - check less wrong. This should all change with increased divergence in selection effects acting on culture due to populations becoming less similar, plus continued divergence on ideological evolution from ancestral environment too. This will mean more clashes of morals like coloniser/colonised, not inter-christian debates. This will imply liberalisms reliance on a broadish public sphere of agreement where personal disagreement can be put aside is unstable. In short most of the agreement on values is highly contingent. Also means the the folk morality that many EAs use in everyday life will be unsustainable under transhumanism - see value change pills, get examples of this reliance being common among EAs.
Interesting link here between historical convergence of ethical views and rational value change Moral progress and philosophy The Alignment Problem and AI safety notes
The gods are philosophers, not engineers: Increasing decision-relevance of moral philosophy