The polis was the most characteristic and, historically, the most significant organization type of Greek state. The emergence of the polis, which has been the basis of Greek civilization for centuries, dates to the mid-8th century BC and coincides, chronologically, with the rise of aristocracy and the consolidation of the social unit of the household.
This type of political organization prevailed in all Greek settlements of Asia Minor, the islands and certain parts of mainland Greece. Poleis resulted from parts of tribes which had broken up during or after the time of the migrations and had become independent, as well as from the amalgamation of komae (villages). The tribal structure survived in many cities as well, as did the division into phylae (tribes) and phratries (clans), whereas the customary law had prevailed everywhere until the Archaic era.
Throughout historical times, the Macedonians, as well as populations who had remained in the area of Pindus and Epirus, preserved the old tribal organization headed by the chief who developed into a hereditary king, the council of chiefs of the race, usually called the council of elders, and the assembly of warriors.
The ancient Greeks identified the concept of the polis with the state and for this reason constitution was its basic element. The characteristic quality of the polis was its limited territory or land in which its jurisdiction was effective. The main settlement included the citadel and was surrounded in most cases by walls. Another characteristic of the polis was autonomy. Each city had its own patron gods, institutions, coinage and troops.

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