“Our ability to create and maintain high levels of future uncertainty”.

Perhaps too abstract for most, but if you do the underlying math, you will see it's crystal clear. Impossible to mistake the wrong kind of consumption for progress. ps nothing wrong with gorging yourself with apples straight off the trees in autumn:) Abundance is nature's prerogative.

I don't quite understand what you mean by "psychological limit to sustainability". So this is my take on the psychological dimension.

Prof. T. W. Murphy points out *that only 10% of humanity consists of logical abstract thinkers (NT profiles). The rest, the vast majority (the ST-SF gene pool) are primarily sentients (thus extremely short-term-minded -seeing & feeling-is-beliving) beings. Anthropologist Joseph Henrich** states this is by evolutionary design, which the current 80%/20% Tinder rule is amplifying. We are Rigged for Ruin :)

Unless we hand over the steering wheel to people who are actually capable of rational thought, open, critical, and constructive dialogue and are not flooded by ego's and emotions. Which in our archaic system of majority rule will never happen. Death by Democracy:) Systemic Consensus is the only system that I think can limit some of the harm the dominance of the prevailing sentientisme brings onto humanity. But I doubt too this will ever happen.

So the resulting collapse will lead to a genetic bottleneck. The smart ones survive, and the rest of the genes become, like the Neanderthals before us, mostly redundant for humanity's next evolutionary phase.

Are we heading for a dawn of some sort of transhumanism or towards a degenerative relapse and reboot? Who knows. Until then, do all you can (like having this dialogue) then simply brace for impact to try to make it over Toby Ord's precipice. Best of luck!

*Chapter 18.1 Personality pages 304-308, Figure 18.3 https://escholarship.org/uc/item/9js5291m

**https://slatestarcodex.com/2019/06/04/book-review-the-secret-of-our-success/