Well, obviously the right thing to do is understand those poorly-understood processes and extrapolate future paths of development, develop a system to judge their relative value (within the limits of our current understanding), and implement way to steer our future in the chosen direction. That's what human rationality is for: finding out what we would want and then how to achieve it.

I would tend to agree. But this would completely change our public discussions on morality, far more than the transition from a very religious to a secular society. It would also shatter our shared historical narrative of moral progress.

Don't see why you use a disjunction here: can't both things happen at the same time?

Sure I directly talk about this scenario and its implications in the original post I linked to.

Also, why think in terms of patchwork rather than in terms of continuum? You appear to be using a loaded metaphor here.

I think patchwork is pretty appropriate before globalization (by globalization I don't mean modern globalization but the whole era since the Age of Discovery).