Zapatistas, Apoists, Chris Boehm's work which suggests many if not all (current) pre-industrial societies (implying all societies from 250 000 - 15 000 years ago) maintain anarchist-like societies.
As such, civilisation (and farming) and therefore hierachical societies account for 0.06% of human societal structures, measured by time.
Edit:
just for kicks:
βThe assumption that what currently exists must necessarily exist is the acid that corrodes all visionary thinking.β
β Murray Bookchin
You can have functioning anarchist societies with traditional values or with same minded -istas and -ists. Not with people with different goals and values. I don't think anarchism works in a modern heterogenic society.
Only with a organized government you can have Mormonistas, and Trumpistas living in the same neighbourhood with a Lesbian couple. Anarchism can't protect minorities against the will of the people. Government can.
As such, civilisation (and farming) and therefore hierachical societies account for 0.06% of human societal structures, measured by time.
Edit:
just for kicks: βThe assumption that what currently exists must necessarily exist is the acid that corrodes all visionary thinking.β β Murray Bookchin