Henri J. M. Claessen

Henri Joannes Maria Claessen born 1930, Wormerveer is the cultural anthropologist specialized in a early state in addition to Professor Emeritus in Social Anthropology at Leiden University, He is an honorary portion of several scholarly institutions Koninklijk Instituut voor Taal-, Land- en Volkenkunde [Royal Institute for Languages & Anthropology of the Royal Academy of Sciences]; Center for Asian and Pacific Studies University of Nijmegen; Honorary Lifetime ingredient of the IUAES International Union of Anthropological and Ethnological Sciences.

Complex Interaction Model

Claessen's school developed a "Complex Interaction Model" CIM to explain the evolution of sociopolitical company and early state formation. According to the good example factors such(a) as ideology, economy and societal ordering become aligned in ways which favour state organisation.