Acephalous society means a society without an head. Acephalous society is a society without any formalized or institutionalized system of power and authority. In an acephalous society, collective decisions are made in informal gatherings. Acephalous society is also known as egalitarian society. In an acephalous society there are no hierarchies present because of the absence of a political leader. Related to acephalous society concept are monocephalous society as in a monarchy, and polycephalous society. Many anarchist and libertarian socialist societies that have abolished social inequality are also considered acephalous societies. A hunter-gatherer society is an acephalous society. The Igbo Nation in West Africa is also an acephalous society and egalitarian society. Certain nomadic societies are also distinguished as acephalous societies.
The non-stratified organization of society of indigenous peoples - Indigenous Peoples in Asia - by Gerald Faschingeder. Although some of these peoples today consist of some million members, indigenous peoples usually are smaller groups that count no more than some hundred thousand members. Many peoples in an acephalous society are politically headless, which does not mean that there is a lack of political concepts, but that they do not know a highest leading person.
Acephalous society is segmentarily organized, i.e. an acephalous society consists of several similar parts or segments that are equal in rank, and these segments may subdivide into sub-segments of various sizes. So, these acephalous societies are not disorganized or without structures, as the former term primitives implied. Of course, they know social differentiation and hierarchy, but nevertheless, there is less division of labor to be found than in non-indigenous societies.
Although the acephalous society or segmentary organization cannot be presented as universal principle of all indigenous societies, this comment indicates why most of the indigenous societies were not and are not easily compatible with non-indigenous ones.
Indigenous societies do have specific cultural characteristics, but their common features cannot be reduced to a single criterion. Kuppe, for example, mentions three central points of this topic: "a close relationship between these societies and their lebensraum, a lack of organization as state and social stratification, and the dealing with conflicts within a society that is not based on institutional force by the state." (Kuppe 1990:10).
Hawthorne, Walter (1998), The interior past of an acephalous society: Institutional change among the Balanta of Guinea-Bissau c. 1400-1950, Ph.D. thesis, Stanford University.