I understand it in the context that it is written, but I think 'theism' is natural to humans,
whereas 'atheism' is an ideal, ever seeking to improve itself.
And that's why you misrepresented the findings of scientific research on a science forum - it was an attempt to present them as supporting your Abrahamic monotheistic beliefs, and disparage those who do not share them.
Atheistic spiritual authority?
Yep.
The oldest and most sophisticated form of spiritual authority - producing, for example, the Tao Te Ching and the I Ching and the life's work of this guy
https://en.wikipedia.org/wiki/Mozi, a thousand years old when the finest minds of Abrahamic theology were burning people alive in the public square for witchcraft.
A shaman seeking knowledge through divination of animal parts is a prime example of theistic behavior,
Except no deity is involved, either in the early days or in the body of metaphysical reasoning and apperception that emerged from it millenia later. So it's kind of odd to describe it as "theistic", don't you think?
and hardly comparable to a mathematical analysis of strategic behavior by a modern ecologist.
The hunting and foraging strategies established are essentially identical, and counterintuitive for most people. Do you think that is a coincidence?
I think it's too bad the ecological folks (by the nature of their means) lack the respect and influence granted the shamans; that spiritual authority is unavailable via their approach, but instead must be cadged and badgered from others in their culture - in this case, unfortunately, authoritative representatives of a comparatively simplistic and immature "theistic" spirituality.
But the Wendell Berry crowd provides hope, there.
https://en.wikipedia.org/wiki/Wendell_Berry