At great altitude, what conditions are needed to support a human community?

In my part of this (Earth-like) world, there is a stable community of completely isolated pre-industrial humans, numbering perhaps 1,800.

They live at an altitude of (at least) 25,000 feet (7620 meters) in a very high inaccessible valley, possibly adjoining the caldera of an extinct volcano.

What geological/ecological conditions would need to prevail in order to support a thriving community?

Stipulations:

• No goats. Yes to liquid water and thriving plants.

• If Reinhold Messner can climb all 14 peaks over 8,000 without oxygen, and do Everest 8,848 m (29,029 ft) twice in two years without it, once solo, then a civilisation can happen at that height.

posted almost 6 years ago

Mr Bumble‭

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