Harold B. Barclay (born January 3, 1924) is professor emeritus in anthropology at the University of Alberta, Edmonton, Alberta. His research has focussed on rural society in modern Egypt and the northern Arab Sudan as well as political anthropology and anthropology of religion. He is also commonly acknowledged as a notable writer in anarchist theory, specialising in theories involving the destruction of the state and how society would operate if leaderless.
- Buurri al Lamaab, a suburban village in the Sudan. Cornell studies in anthropology. Ithaca, N.Y.: Cornell University Press, 1964.
- The role of the horse in man's culture. London: J.A. Allen, 1980. ISBN 0851313299
- Culture: the human way. Calgary. Alta., Canada: Western Publishers, 1986. ISBN 0919119115
- People without Government: An Anthropology of Anarchy, rev. ed., Seattle: Left Bank Books, 1990. ISBN 0-939306-09-3.
- Culture and anarchism. London: Freedom Press, 1997. ISBN 0900384840
- The state. London: Freedom Press, 2003. ISBN 1904491006
- Longing for Arcadia: memoirs of an anarcho-cynicalist anthropologist. Victoria, B.C.: Trafford, 2005. ISBN 1412056799
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