Anarchism is not feasible on a large scale, most places in the world will tend towards hierarchy. There are certain necessary conditions for Anarchism to be sustainable long-term, such as the Zomia region in SE Asia due to geography. That’s assuming these tribes are non-hierarchical, I haven’t looked that far into it.
stateless societies like "Zomia" have successfully repelled states using location, specific production methods, and cultural resistance to states.