Why did Shamanism evolve in societies all around the globe

https://aeon.co/amp/essays/why-did-shamanism-evolve-in-societies-all-around-the-globe?fbclid=IwAR062KktCCcwhKlHG5nZNPAgA73xyJUbvLNWq-yJ0i4zjE0MzTD4hKwhlaQ

Masters of reality

The trances and healing powers of shamans are so widespread that they can be counted a human universal. Why did they evolve?

Thomas T Hills is professor of psychology at the University of Warwick in Coventry, UK.

2,700 words